Tellerium is a rare, silvery-white, semi-metallic element which exhibits both metallic and non-metallic traits.
A strong and durable wood that doesn't shrink much and is comparatively easy to work.
Tear Length
Measure of the drawability of sheet metal.
Tear Resistance
The ability of a thin film, paper or textile to resist tearing.
A convenient unit of capacity.
Equal to two to the power of forty bytes.
A radioactive element not found in ores.
Technical Atmosphere
A metric unit of pressure equal to one kilogram of force per square centimetre.
Technical Report
A document that discusses the technical issues of a subject.
Technology Readiness Level
A measure used to assess the maturity of evolving technologies prior to incorporating that technology into a system or subsystem.
Technology Roadmap
A plan that matches short-term and long-term goals with specific technology solutions to help meet those goals.
Technology Validation
Confirming that technical targets for a given technology have been met.
Tectonic Earthquakes
Earthquakes resulting from sudden release of energy stored by major deformation of the Earth.
Tee Joint
A joint between two members located approximately at right angles to each other in the form of a T.
Tradename for Polytetrafluoroethylene.
Telecentric Lens
A multi-component system whose aperture stop is located at the front focus so that the chief rays are parallel to the optical axis in image space.
The transmission, emission, or reception of signs, signals, writings, images, or sounds.
Communications between remote sources by wire, radio, or other means.
Instrument used to focus electromagnetic radiation into an image.
Telescopic Shock Absorber
A tubular damper operated by rod and piston, either single or twin-tube.
Telescoping Gauge
A T-shaped gage used to measure the diameter or width of holes.
Telecommunication medium for transmitting and receiving moving images and sound.
Telford, Thomas
Scottish civil engineer, architect and stonemason, and a noted road, bridge and canal builder.
Old name for Hydrogen I Telluride.
A rare, silvery-white, semi-metallic element which exhibits both metallic and non-metallic traits.
Telodynamic Transmission
The system of transmitting power over long distances by means of pulleys and wire ropes.
An abbreviation of Transmission Electron Microscope.
Reheating hardened steel or hardened cast iron to some temperature below the eutectoid temperature for the purpose of decreasing the hardness and increasing the toughness.
Temper Colours
The colours which appear on the surface of steel heated at low temperature in an oxidizing atmosphere.
A measure as to whether two bodies are hot or cold relative to one another.
Temperature Coefficient
The amount of change of a parameter per unit change in temperature.
Temperature Control
Temperature operated thermostatic device which automatically opens or closes a circuit.
Temperature Humidity Index
Actual temperature and humidity of air sample compared to air at standard conditions.
Temperature Inversion
The condition in which warm air is formed above a layer of cool air that is near the earth′s surface.
Temperature Range
The minimum to maximum temperature over which a piece of equipment will operate.
Temperature Resolution
The minimum change in temperature that can be detected.
Reheating a quench-hardened or normalized ferrous alloy to a temperature below the transformation range and then cooling at any rate desired.
A pattern to guide the marking or cutting of a shape.
The speed of occurrence of the beats for a given metric structure.
An adjective meaning "pertaining to time"
Temporary Magnet
Material which has magnetic properties when being brought near a magnetic field, but which loses these properties when the field is removed.
Temporary Threshold Shift
A temporary impairment of hearing acuity as indicated by a change in the threshold of audibility.
Temporary Water Hardness
The component of total water hardness that can be removed by boiling the water.
The tensile stress expressed as force per unit linear density of an unstrained specimen.
A projection made by cutting away the wood around it to insert into a mortise to make a joint.
Tenon Saw
Fine-toothed hand saw used to cut tenons and other wood joints accurately.
An array of tension cables and compression rods that supports a structure that were invented by Buckminster Fuller student Kenneth Snellson.
Tensile Fracture
A fracture caused by tensional stress.
Tensile Modulus of Elasticity
Tangent or secant modulus of elasticity of a material subjected to tensile loading.
Tensile Strength
The ultimate strength of a material prior to fracture when subjected to an increasing tension load.
Tensile Stress
Stress acting on the cross-sectional area of a body normal to the tension force acting on the body.
Tensile Test
Method for determining behaviour of materials under axial stretch loading.
A stretching force that pulls on a material.
Tension Ring
A support ring that resists the outward force pushing against the lower sides of a dome.
Tension Set
Extent to which vulcanized rubber is permanently deformed after being stretched a specified amount for a short time.
Tension Shackle
A link attached to the rear eye of a leaf spring and to the frame of the vehicle.
Materials of all types and sizes that are erupted from a crater or volcanic vent and deposited from the air.
Prefix representing a multiplication of 1012
Tera Electron Volt
One trillion electron Volts.
One trillion cycles per second, 1012 Hz.
A substance that can cause deformities in embryos. Dioxin is a teratogen.
Used in the semiconductor industry as a dopant.
A point at which electrical connections can easily be made or broken.
Terminal Board
An insulating base or slab equipped with terminals for connecting wiring.
Terminal Diagram
A diagram of a switch, relay, terminal board, or other component showing the connections to the equipment.
Terminal Lug
A device attached to a conductor to permit connection to a terminal.
Terminal Reaction
A reaction that ends a cycle or chain of other chemical reactions.
Terminal Side
The side that the measurement of an angle ends at.
Terminal Solid Solution
A solid solution that exists over a composition range extending to either composition extremity of a binary phase diagram.
Terminal Speed
The speed obtained in free fall when the upward force of air resistance is equal to the downward force of gravity.
Terminal Voltage
The voltage at the battery or electrical power source terminals.
Termination Shock
Particles from the Sun begin to slow and clash with matter from the sparse gas found between the stars.
A device that provides electrical resistance at the end of a transmission line.
A copolymer composed of three different types of monomers.
Terrestrial Planet
One of four rocky planets found within the inner solar system.
The geological period from 65 million to 1.64 million years ago.
Tertiary Amyl Ethyl Ether
An ether based on reactive C5 olefins and ethanol.

Tertiary Amyl Methyl Ether
An ether based on reactive C5 olefins and methanol.

Tertiary Logic
An experimental technology in which logic gates are based on three distinct voltage levels.
The SI unit of magnetic flux density and equal to 1 weber per square metre.
Tesla Antenna
A form of wireless antenna or wave launching structure developed by Nikola Tesla.
Tesla Coil
An electrical oscillator developed by Nikola Tesla which produces high voltage, radio frequency alternating electric current.
Tesla Coil Transmitter
A Tesla coil configured specifically for the purpose of wireless transmission of electrical energy using either of two ground-based methods.
Tesla Effect
The wireless transmission of electrical energy between a Tesla coil transmitter and a Tesla receiving transformer by the means of electrical currents.
Tesla Receiving Transformer
A grounded resonance transformer specifically intended for the reception of energy transmitted by a Tesla coil transmitter.
Tesla Turbine
A rotary engine consisting of multiple ported disks where high velocity gases enter tangentially through a wide nozzle at the periphery of the disks.
A covering of a plane with congruent copies of the same region with no holes or overlaps.
Test Cell
A cubicle or room designed for the testing or a system or component.
Test Equipment
A general term applied to devices used to test electrical and electronic circuits.
Test Oil
Any oil subjected to evaluation in an established procedure.
Test Parameter
A specified component, property, or condition of a test procedure.
Alternative name for Carbon Tetrachloride.
Unit of quantity equal to four.
Tetraethyl Germanium


An organogermanium compound used in vapour deposition of germanium.

Tetraethyl Lead
An octane enhancer.
Tetraethyl Tin


An important example of an organotin compound.



Colourless and odourless gas, used in circuit board manufacture, manufacture of insulating materials and semiconductors. Also used as a low temperature refrigerant.

A four-sided polygon.
A molecular shape that results when there are four bonds and no lone pairs around the central atom in the molecule.
A polyhedron with four faces.
Tetramethyl Lead


Colourless liquid,

Tetramethyl Tin


One of the simplest organotin compounds, is useful for transition-metal mediated conversion of acid chlorides to methyl ketones and aryl halides to aryl methyl ketones.

A four-electrode tube or transistor.
Tetrode Tube
A four-electrode electron tube containing a plate, a cathode, a control grid, and a screen grid.
A four-square polyomino.
Abbreviation of Tera electron Volt.
The unit of linear density equal to the mass in grams per 1000 m of fibre, yarn, or other textile strand.