P

P   p   P   P  

Pa

Pa   Pa   Pace   Packing   Packing Density  
Packing Rings   Page   Pagoda   PAH   Paint  
Paintbrush   Pair Annihilation   Pair Production   Palaeocene   Paleozoic  
Palermo Scale   Palindrome   Palindromic   Palladium   PAM  
Pandiagonal Magic Square   Pandigital   Panel Hammer   Panel Saw   Paper  
Paper Glue   Paper Sizes   Parabolic Reflector   Paraboloid   Parabrake  
Paracetamol   Parachute   Paradox   Paraffin Oil   Paraffin Wax  
Paraheliotropism   Parallax   Parallel   Parallel Circuit   Parallel Hybrid Vehicle  
Parallel Limiter   Parallel Negative Limiter   Parallel Planes   Parallel Port   Parallel Positive Limiter  
Parallel Resonant Circuit   Parallel Transfer   Parallelepiped   Parallelogram   Parallelogram of Forces  
Paramagnetic Material   Paramagnetism   Parametric Amplifier   Parametric Device   Parana Pine  
Parasitic Array   Parasitic Element   Parasol Monoplane   Paraxial Optics   Parent Isotope  
Parenthesis   Pareto Distribution   Paris Bronze   Parity   Parity Bit  
Parquet Floor   Parsec   Parsons, Charles Algernon   Partial Correlation   Partial Miscibility  
Partial Oxidation   Partial Pressures   Partial Vacuum   Partial Zero Emission Vehicle   Particle Accelerator  
Particle Beam   Particle Board   Particle Velocity   Particulate   Parting  
Parting-off Tool   Partition   Partition Function   Parts per Billion   Parts Per Million  
Parts Per Million by Volume   Parts Per Million by Weight   Parts per Quadrillion   Parts per Thousand   Pascal  
Pascal, Blaise   Pascal Distribution   Pascal Second   Pascal′s Law   Pascal′s Triangle  
Paschen Law   Paschen Series   Pass-by Noise   Passenger Compartment Acoustic Absorption   Passivation  
Passivator   Passive Absorber   Passive Cell Balancing   Passive Crossover   Passive Diffusion  
Passive Satellite   Passive Transport   Password Authentification Protocol   Pasteur, Louis   Patch Panel  
Patent   Path Function   Path Length   Path Loss   Pathogen  
Patina   Pattern   Pattern Recognition   Pauli Exclusion Principle   Pauling, Linus  
Payback Time  

Pb

Pb   P-Band   PbCO3   PbCrO4   PbO  
PbO2  

pc

pc   PCB   pcf   PCI   PCM  
PCMCIA   PCT Theorem  

Pd

Pd   pdl   PDM  

Pe

Peak   Peak Counting   Peak Current   Peak Hold   Peak Load  
Peak Pick   Peak Sound Pressure Level   Peak to Average Power ratio   Peak to Peak Value   Peak Torque  
Peak Value   Peak Voltage   Peaking Coil   Pearl Ash   Pearlite  
Pearson Product Moment Correlation Coefficient   Peat   pebibyte   Peck   Peclet Number  
Pedal Triangle   Pedestal Bearing   Pediment   Peel Strength   Peen Hammer  
Peening   Peer to Peer   Peierls Stress   Pein Hammer   Pell Number  
Peltier Effect   PEM Fuel Cell   Pencil Beam   Pendentive   Pendulums  
penetrant inspection   Pennyweight   Penrose Impossible Staircase   Penstock Valve   Pentad  
Pentadecagon   Pentafluoride Antimony   Pentagon   Pentagonal Number   Pentagram  
Pentagrid Converter   Pentane   Pentanol   Pentavalent Impurity   Pentode Tube  
Pentomino   penumbra   Peptidase   Peptide   Peptide Bond  
per annum   Per Diem   per Foot Run   per Foot Super   Per Mensem  
per mill   Perceived Colour   Perceived Noisiness   Percent   Percent of Modulation  
Percent Yield   Percentage Articulation Loss of Consonants   Percentile   Perceptual Coding   Perfect Crystal  
Perfect Cube   Perfect Fluid   Perfect Gas   Perfect Number   Perfect Power  
Perfect Radiator   Perfect Square   Perfluorocarbons   Perfluoromethane   Perfluorosulphonic Acid  
Periapsis   Pericentre   Pericynthian   peri-Ethylenenaphthalene   Perigee  
Perigee Speed   Perihelic Opposition   Perihelion   Perimeter   Period  
Periodic   Periodic Law   Periodic Quantity   Periodic Table   Periodic Trend  
Periodic Wave   Peripheral Component Interconnect   Peritectic   Perl   Permafrost  
Permanent Hardness   Permanent Magnet   Permanent Magnet Speaker   Permanent Threshold Shift   Permanganic Acid  
Permangante of Potash   Permeability   Permeability of Free Space   Permeance   Permian  
Permittivity   Permittivity of Free Space   Permutations and Combinations   Perpendicular   Persistence  
Personal Computer Memory Card International Association   Perspective   Perspective Drawing   Perspex   Pesticide  
Peta   PetaFlops   Petrol   Petrol Engine   Petroleum  
Petroleum Fuel   Peukert Equation   Pewter   pF   PFCs  

Pf

Pflops   PFM   Pfund Series   pH  

Ph

Phagosome   Phanerozoic   Phantastron   Phantom Power   Pharmacognosy  
Pharmacology   Phase   Phase Angle   Phase Boundary   Phase Change  
Phase Delay   Phase Diagram   Phase Locked Loop   Phase Modulation   Phase Rule  
Phase Separation   Phase Shift   Phase Shifter   Phase Transformation   Phase Velocity  
Phased Array Antenna   Phased Array Radar   Phenol   Phenolic Resin   Phenotype  
Phenyl   Phenyl Methyl Ketone   Phenylamine   phi   Philosopher′s Wool  
Phlogisticated Air   Phlogiston   Phon   Phoneme   Phonetic Alphabet  
Phonometer   Phonon   Phosphate   Phosphodiester Linkage   Phospholipid  
Phosphor Bronze   Phosphorescence   Phosphoric Acid   Phosphoric Acid Fuel Cell   Phosphorolysis  
Phosphorus   Phosphorylation   Phot   Photo Etching   Photocell  
Photochemical Reaction Centre   Photochemistry   Photodiode   Photoelectric Effect   Photoelectric Sensor  
Photoelectric Voltage   Photoelectrochemical Cell   Photoelectron   Photology   Photoluminescence  
Photometer   Photons   Photophosphorylation   Photoreduction   Photosphere  
Photosynthesis   Phototransistor   Phototroph   Photovoltaic Array   Photovoltaic Cell  
Photovoltaic Cell Efficiency   Photovoltaic System   Phreatic Eruption   Phreatomagnetic   Physical Change  
Physical Chemistry   Physical Constants   Physical Property   Physics   Physics Books  
Physics Calculations   Physics Conversions   Physics Weblinks   Physiological Acceleration   Phytochemicals  
Phytochemistry   Phytoplankton  

pi

pi   Pi Bonds   Piano Hinge   Piano Wire   PiB  
Pica   Picaxe   Pick Hammer   Picket Fence Effect   Pickling  
pico   picogram   picolitre   picometre   picosecond  
Picture   Pie Chart   Piecewise Function   Pier   Piezo Sounder  
Piezoelectric   Pig Iron   Pile   Pile Driver   Pillow Lava  
Pilot Balloon   Pilot Bit   Pilot Hole   Pin Connection   PIN Diode  
Pin Spanner   Pinchbeck   Pine   Pinhole   Pinion  
Pink Noise   Pinna   Pint   Pion   Pipe  
Pipe Cutter   Piston   Piston Crown   Piston Driven Wind Tunnel   Piston Pin  
Piston Ring   Piston Skirt   Pit Saw   Pitch   Pitch - Vehicle Dynamics  
Pitch Angle   Pitch Circle   Pitch Pine   Pitch Sensitivity   Pitchblende  
Pitched Howe Truss   Pitched Pratt Truss   Pitot, Henri   Pitot Tube   Pitting  
Pivot Point   Pixel   P-JFET   pK   PLA  

Pl

Place Effect   Place Value   Plain Bearing   Plain Cutter   Plain Screwdriver  
Plan Position Indicator   Planar Power Transformer   Planar Tube   Planck, Max   Planck Radiation Law  
Plancks Constant   Plane   Plane Angle   Plane of Polarization   Plane Section  
Plane Wave   Plane Wood   Planet   Planetary Nebula   Planform  
Planing   Plankton   Plasma   Plasma Discharge   Plasma Frequency  
Plasma Membrane   Plasma Proteins   Plasma Wave   Plaster of Paris   Plasterboard  
Plastic   Plastic Deformation   Plastic Flow   Plastic Strain   Plastic Strain Ratio  
Plasticine   Plasticity   Plasticity Number   Plasticizer   Plastid  
Plate   Plate Modulator   Plate Resistance   Plate Techtonics   Platelets  
Plating   Platinum   Plato   Platonic Year   Platykurtic  
PLD   Pleated Filter   Pleistocene   Plenum   Pliers  
Plinian Eruption   Pliocene   Plumb   Plumbago   Plumbum  
Plunger   Plus   Pluto   Pluton   Plutonium  
Plywood  

Pm

Pm   PM0.1   PM10   PM2.5   PMC  
P-MOSFET   p-n Junction  

Pn

Pneumatic   Pneumatic Form   PNP Transistor  

Po

Po   Pockels Cell   pOH   Point   Point Contact Diode  
Point Defect   Point Mobility   Point Source   Point to Point Wiring   Point Type Face  
Pointer   Poise   Poiseuilles Equation   Poisson Constant   Poisson Distribution  
Poisson Equation   Poisson Spot   Poissons Ratio   Polar Axis   Polar Bond  
Polar Coordinates   Polar Form of Complex Numbers   Polar Molecules   Polar Moment of Inertia   Polar Orbiting Satellite  
Polarimeter   Polarisation Curve   Polariscope   Polariser   Polarity  
Polarization   Polarized   Pole   Pole Piece   Pole Strength  
Polonium   Polyamide   Polyatomic Ion   Polyatomic Molecule   Polycarbonate  
Polycrystalline   Polycrystalline Solar Cell   Polydentate Ligand   Polyethylene   Polygon  
Polyhedral   Polyimide   Polymer   Polymer Matrix Composite   Polymeric Dispersant  
Polymerization   Polymerize   Polymethyl Methacrylate Resin   Polymorphism   Polynomial  
Polynuclear Aromatic Hydrocarbons   Polyomino   Polyphase AC   Polyphosphate   Polysaccharide  
Polystyrene   Polytetrafluoroethylene   Polythene   Polytropic Process   Polyurethane  
Polyvinyl Acetate   Polyvinyl Alcohol   Polyvinyl Chloride   Polyvinylpyrrolidone   Ponderous Spar  
Pop   Pop Valve   POP3   Poplar   Poppet Valve  
Population   Porcelain   Pore Size Distribution   Porosity   Porous Bearing  
Port   Portals, News and Directories   Portals, News and Directories Weblinks   Portico   Position Sensor  
Position Servosystem   Positional Notation   Positional Weighting   Positive   Positive Alternation  
Positive Charge   Positive Clamper   Positive Displacement Pump   Positive Feedback   Positive Logic  
Positive Number   Positive Temperature Coefficient   Positron   Post Office Protocol version 3   Post Triggering  
Postcure   Postulate   Pot Life   Potable Water   Potash  
Potassium   Potassium Acetate   Potassium Bromide   Potassium Carbonate   Potassium Chloride  
Potassium Fluoride   Potassium Hydroxide   Potassium Iodide   Potassium Manganate VII   Potassium Nitrate  
Potassium Oxide   Potassium Permanganate   Potassium Peroxide   Potassium Sulphide   Potassium Superoxide  
Potential Barrier   Potential Difference   Potential Energy   Potential Gradient   Potential Transformer  
Potentiometer   Potin   Potting Compound   Pouch Cell Battery   Poultice Corrosion  
Pound   Pound Force   Pound Force Foot   Pound per Cubic Foot   Pound per Cubic Inch  
Poundal   Pounds per Square Inch   Pour Point   Pour Point Depressant   Pour Stability  
Powdered Baking Ammonia   Power   Power Amplifier   Power Curve   Power Density  
Power Factor   Power Flux Density   Power Gain   Power Hacksaw   Power Loss  
Power Lost to Engine Friction   Power of a Lens   Power Pentode   Power Spectral Density   Power Standing Wave Ratio  
Power Stroke   Power Supply   Power Surface Density   Power to Weight Ratio   Powerline Carrier System  
Power-Split Hybrid Vehicle   Poynting-Robertson Effect  

pp

ppb   ppm   PPM   ppmv   PPMVD  
ppmw   ppth  

Pr

Pr   Practical Number   Prandtl Number   Praseodymium   Pre Combustion Chamber  
Pre Ignition   Pre Triggering   Preamplifier   Prebiotic   Precambrian  
Precast Concrete   Precedence Effect   Precession   Precession Vector   Precipitate  
Precipitation   Precipitation Hardening   Precipitation Heat Treatment   Precision Casting   Precure  
Preferred Noise Criteria   Preliminary Analysis   Prepreg   Presbycusis   Pressure  
Pressure Altimeter   Pressure Bag Moulding   Pressure Coefficient   Pressure Drop   Pressure Gauge  
Pressure Gradient   Pressure Head   Pressure Relief Valve   Pressure Switch   Pressure Type Anemometer  
Pressure Welding   Pressure Zone   Pressurized   Pre-Stressed Concrete   Preventive Maintenance  
Prick Punch   Primal Glow   Primary Bond   Primary Cell   Primary Energy Source  
Primary Reference Temperatures   Primary Standard   Primary Winding   Prime Numbers   Prime Verical Circle  
Primitive Pythagorean Triangle   Primitive Root of Unity   Prince′s Metal   Principal Component Analysis   Principal Curve  
Principal Quantum Number   Principal Vertical Circle   Principle of Uniformity   Printed Circuit Board   Prism  
Prismatic Battery   Privacy Index   Probability   Probe   Process Capability  
Process Engineered Fuel   Product   Profile   Profile Drag   Program  
Program Counter   Programmable Logic Array   Programmable Logic Device   Programming Languages   Projectile Motion  
Prokaryote   Prokaryotic Cell   Prolate Spheroid   PROM   Promethium  
Prompt Neutrons   Pronic Number   Prony   Proof Stress   Propagation  
Propagation Anomaly   Propagation Loss   Propagation Path   Propagation Test   Propane  
Propanol   Propanone   Propargyl Alcohol   Propeller   Propene  
Propene Acid   Propenoic Acid   Proper Divisor   Proper Fractions   Proper Time  
Proportion   Proportional Limit   Proportionality   Propshaft   Propulsion  
Propyl Alcohol   Propylene   Propylene Glycol   Protactinium   Protective Devices  
Protective Relay   Protein   Protein Kinases   Protein Targetting   Proterozic  
Proterozoic   Protist   Protium   Protocol   Proton  
Proton Acceptor   Proton Donor   Proton Exchange Membrane Fuel Cell   Proton-Motive Force   Proton-Proton Chain  
Protoplanet   Protoplanetary Disc   Protoscience   Protosun   Protractor  
Prussic Acid   PS   PSD  

Ps

Pseudocore   psi   psi   psia   psid  
psig   psisg   psivg   PSWR   Psychoacoustics  
Psychrometer   Psychrometric Chart   Psychrometry  

Pt

Pt   PTFE   PTM   Ptolemy   Ptolemy′s System  
p-type Semiconductor  

Pu

Pu   Pulley   Pulmonary Artery   Pulmonary Valve   Pulmonary Vein  
Pulsar   Pulse   Pulse Amplitude Modulation   Pulse Code Modulation   Pulse Compression  
Pulse Duration   Pulse Duration Modulation   Pulse Forming Network   Pulse Frequency Modulation   Pulse Modulated Field  
Pulse Modulation   Pulse Oscillator   Pulse Output Power   Pulse Position Modulation   Pulse Range  
Pulse Repitition Rate   Pulse Time Modulation   Pulse Width   Pulse Width Modulated Wave Inverter   Pulse Width Modulation  
Pultrusion   Pulverizer   Pumice   Pump   Pump Down  
Punch   Pure Air   Pure Error   Pure Procedure Code   Pure Substance  
Pure Tone   Push Pull Amplifier   Pusher Seal   Pushrod   Putrescine  
PV Cell   PV Diagram   PVA   PVC   PWM  

Py

Pylon   Pyramid   Pyranometer   Pyrex Glass   Pyrgeometer  
Pyrheliometer   Pyrheliometry   Pyroclastic   Pyroclastic Flow   Pyroclastic Surge  
Pyroelectricity   Pyrolyser   Pyrolysis   Pyrometer   Pyrometric Photography  
Pyron   Pyrophoric   Pythagoras   Pythagoras Theorem   Pythagorean Triangle  
Pythagorean Triple   PZEV