20-letter words containing etr
- asymmetrical warfare — warfare between a powerful military force and a weak guerilla force
- bolometric magnitude — the magnitude of a star derived either from the total energy that it radiates at all wavelengths or from the total energy of those of its wavelengths that are received on earth.
- carbon tetrachloride — a colourless volatile nonflammable sparingly soluble liquid made from chlorine and carbon disulphide; tetrachloromethane. It is used as a solvent, cleaning fluid, and insecticide. Formula: CCl4
- decomposed petri net — (parallel) (DPN) A Petri net that has been split into multiple, interconnected nets. This makes it easier to analyse or run the net. DPNs are the basis of concurrency in ConC.
- descriptive geometry — the study of the projection of three-dimensional figures onto a plane surface
- dinitrogen tetroxide — a colourless gaseous substance that exists in equilibrium with nitrogen dioxide. As the temperature is reduced the proportion of the tetroxide increases. Formula: N2O4
- gravimetric analysis — analysis by weight.
- isometric projection — a type of axonometric projection in which the object is shown with its three principal axes all equally tilted from the plane of viewing, with two of them usually tilted 30 degrees upward from the horizontal
- metric hundredweight — a unit of weight equivalent to 50 kilograms.
- nickel tetracarbonyl — nickel carbonyl.
- parametric amplifier — a device, as an electron tube or transistor, that amplifies a high-frequency input signal by sinusoidally varying the reactance of the circuit.
- parametric equalizer — an electronic device for cutting or boosting selected frequencies by continuous narrowing or widening of the frequencies to be filtered
- parametric equations — one of two or more equations expressing the location of a point on a curve or surface by determining each coordinate separately.
- psychometric testing — the use of psychometric tests, often as a selection method
- silicon tetrahydride — silane (def 1).
- stoichiometric ratio — The stoichiometric ratio is the exact ratio between air and flammable gas or vapor at which complete combustion takes place.
- symmetric difference — the union of the relative complements of two sets.
- tetrahydrocannabinol — a compound, C 21 H 30 O 2 , that is the physiologically active component in cannabis preparations (marijuana, hashish, etc.) derived from the Indian hemp plant or produced synthetically. Abbreviation: THC.
- tetrahydrogestrinone — a synthetic anabolic steroid. Formula: C21H28O2
- trigonometric series — an infinite series involving sines and cosines of increasing integral multiples of a variable.
- trimetric projection — a three-dimensional projection with three different linear scales at arbitrary angles.
- without detriment to — If something happens without detriment to a person or thing, it does not harm or damage them.
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