O

O   O3  

Oa

Oak  

Ob

Objective   Objective Tinnitus   Oblate Spheroid   Obligate Anaerobes   Oblique Angle  
Oblique Coordinates   Oblique Triangle   Observation   Obsidian   Obtuse Angle  
Obtuse Triangle  

Oc

Occams Razor   Occultation   Occupational Safety & Health Administration   Occupied Bandwidth   Ocean Conveyor Belt  
Octadecagon   Octadecanoic Acid   Octagon   Octahedral Position   Octahedron  
Octal   Octane   Octane Number   Octant   Octave  
Octave Band   Octave Band Level   Octet   Octet Rule   Octillion  
Ocular   Oculogyric   OCV   OD  

Od

Odd Function   Odd Number   Odds   OEM  

Oe

Oersted   Oersted, Hans Christian  

of

of the order of   Off Centre   Off Frequency Rejection   Off Line Test Equipment   Office Noise Index  
Offset Binary Coding   Offset Error   Offset Yield Strength   OHC  

Oh

Ohm   Ohm, Georg Simon   Ohm Metre   Ohmmeter   Ohms per Square  
OHV  

Oi

Oil   Oil Canning   Oil Consumption   Oil Control Ring   Oil Detergent  
Oil Groove   Oil Hardening   Oil Mist   Oil Mist Lubrication   Oil of Bitter Almond  
Oil of Mirbane   Oil of Vitriol   Oil Seal   Oil Splash System   Oil Whirl/Whip  
Oilstones  

ok

okta  

Ol

Olbers Paradox   Oldham Coupling   OLED   Oleoresin   Olf  
Oligocene   Olive Oil  

om

omega   omicron   Omni   Omnidirectional   Omnidirectional Antenna  

On

On Line Test Equipment   On This Day   One Dimensional   One to One   onto  

Op

Op Amp   Opacity   Opaque   Open Circuit   Open Circuit Voltage  
Open Crank Engine   Open Differential   Open Interval   Open Loop   Open Loop Fuel Control  
Open Loop Gain   Open System   Open Window Unit   OpenGL   Operand  
Operating Point   Operating Pressure   Operating Stress   Operating System   Operational Amplifier  
Opposed Piston Engine   Opposite Faces   Opposition   Optic Axis   Optical Activity  
Optical Alignment   Optical Axis   Optical Cavity   Optical Coupler   Optical Double Star  
Optical Encoder   Optical Filter   Optical Flat   Optical Illusion   Optical Interference  
Optical Isomers   Optical Pumping   Optical Pyrometer   Optical Transmission   Optics  
Optics Calculations   Optics Conversions   Optics Weblinks   Optimum Working Frequency   Opto-Coupler  
Opto-Isolated  

Or

Or Gate   Orbit   Orbit Acquisition   Orbital   Orbital Angular Momentum Quantum Number  
Orbital Equation   Order   Order Analysis   Order of Magnitude   Order of Reaction  
Order Tracking   Ordered Pair   Ordered System   Ordering   Ordinal Data  
Ordinal Number   Ordinate   Ordovician   Ore   Organic Aerosol  
Organic Chemistry   Organic Compound   Organic Light Emitting Diode   Organochromic Indicators   Orichalchum  
Orientation   Oriented Strand Board   Orifice   Origin   Original Equipment Manufacturer  
Ormolu   Ornithopter   Orthic Triangle   Orthocentre   Orthogonal  
Orthogonal Complement of a Subpace   Orthogonal Matrix   Orthogonal Set of Vectors   Orthonormal Set of Vectors   Orthophospheric Acid  

Os

Os   Oscillation   Oscillator   Oscilloscope   OSHA  
Osmiridium   Osmium   Osmole   Osmometry   Osmosis  
Osmotic Pressure   Ossicles  

Ot

Otologist   Otto Cycle   Otto, Nikolaus August  

Ou

Ounce Force   Ounce per Gallon   Ounces   Out of Phase   Outcome  
Outcome Space   Outer Dead Centre   Outfeed   Outgassing   Outlier  
Output   Output Impedance   Outside Caliper   Outside Diameter  

Ov

Oval Window   Over Current Device   Over Discharge   Overall RMS Level   Overcast  
Overcharge   Overcoupling   Overdrive   Overdriven   Overhang Beam  
Overhead Cam   Overhead Valve   Overhung Load   Overlap Processing   Overload Rating  
Overmodulation   Overrun   Oversampling   Overspeed Protection   Oversteer  
Overstressing   Overtone   Ovum  

ow

owu  

Ox

Oxalic Acid   Oxidant   Oxidation   Oxidation Half Reaction   Oxidation Number  
Oxidation of Engine Oil   Oxidation Reaction   Oxidation-Reduction Reaction   Oxide   Oxidizing Agent  
Oxidizing Flame   Oxyacetylene Welding   Oxyacid   Oxygen   Oxygen Cutting  
Oxygen Sensor   Oxygenases   Oxygenated Fuel  

oz

oz   ozf   Ozone   Ozone Layer