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Eng ID Term Definition
5921
water specimen cup
See WATER BOTTLE.
5922
water turbulence
The disturbance of water caused by the interaction of any combination of WAVES, CURRENTS, TIDAL STREAMS, WIND, SHOAL patches and OBSTRUCTION... more
The disturbance of water caused by the interaction of any combination of WAVES, CURRENTS, TIDAL STREAMS, WIND, SHOAL patches and OBSTRUCTIONs.
5923
water vapor
Water in the gaseous phase.
5924
waterway
A line of water (RIVER, CHANNEL, etc.) which can be utilized for com­munication or transport.
5925
watt
The unit of power in the SI system.
5926
wave
A disturbance which moves through or over the surface of the medium with SPEED dependent upon the properties of the medium. A ridge deformat... more
A disturbance which moves through or over the surface of the medium with SPEED dependent upon the properties of the medium. A ridge deformation, or UNDULATION of the surface of a liquid.
5927
wave: capillary
A WAVE whose VELOCITY of propagation is controlled primarily by the surface tension of the liquid in which the WAVE is travell­ing. Water wa... more
A WAVE whose VELOCITY of propagation is controlled primarily by the surface tension of the liquid in which the WAVE is travell­ing. Water waves of length less than one INCH are considered to be capilla­ry waves.
5928
wave: carrier
A RADIO WAVE used as a vehicle for con­veying intelligence, generally by MODULATION. Also called carrier.
5929
wave: cellular
System of SURFACE WAVES in which the OSCILLATION of water is limited as by solid BOUNDARIES. The PERIOD is the same in adjacent cells.
5930
wave: compressional
A WAVE in an elastic medium which causes an element of the medium to change its volume without undergoing rotation.
5931
wave: continuous
A series of WAVES of like AMPLITUDE and FREQUENCY. See WAVE: MODULATED, PULSE.
5932
wave: cycloidal
A very steep, symmetrical WAVE whose CREST forms an angle of 120 DEGREES. The wave form is that of a cycloid. A TROCHOIDAL WAVE of maximum s... more
A very steep, symmetrical WAVE whose CREST forms an angle of 120 DEGREES. The wave form is that of a cycloid. A TROCHOIDAL WAVE of maximum steep­ness.
5933
wave(s): damped
WAVE(S) the AMPLITUDE of which becomes progressively smaller.
5934
wave: direct
A subdivision of the space wave component of the electromagnetic GROUND WAVE. This WAVE is propa­gated directly through space, i.e., it foll... more
A subdivision of the space wave component of the electromagnetic GROUND WAVE. This WAVE is propa­gated directly through space, i.e., it follows the shortest path between TRANSMITTER and RECEIVER.
5935
wave: edge
An ocean wave travelling parallel to a COAST, with CRESTS normal to the COASTLINE. Such a WAVE has a HEIGHT that diminishes rapidly seaward ... more
An ocean wave travelling parallel to a COAST, with CRESTS normal to the COASTLINE. Such a WAVE has a HEIGHT that diminishes rapidly seaward and is negligible at a distance of one WAVE LENGTH offshore.
5936
wave: electromagnetic
WAVE(S) of associated electric and magnetic fields characterized by variations of the fields. The electric and magnetic fields are at right ... more
WAVE(S) of associated electric and magnetic fields characterized by variations of the fields. The electric and magnetic fields are at right angles to each other and to the direction of propaga­ti­on. An electromagnetic wave is coherent if the phase-time relationship is constant throughout the propagation path.
5937
wave: forced
A WAVE gener­ated and maintained by a continuous force, in contrast to a FREE WAVE that continues to exist after the generating force has ce... more
A WAVE gener­ated and maintained by a continuous force, in contrast to a FREE WAVE that continues to exist after the generating force has ceased to act.
5938
wave: free
A WAVE that continues to exist after the generating force has ceased to act, in contrast with a FORCED WAVE that is generated and maintained... more
A WAVE that continues to exist after the generating force has ceased to act, in contrast with a FORCED WAVE that is generated and maintained by a con­tinuous force. A free wave on a water surface is one created by a sudden impulse, thereafter influenced only by fric­tion, the dimensions of the BASIN, and the dispersive charac­ter of the water medium it moves in. Most ocean surface waves except TIDAL WAVES are free waves. See OSCILLATI­ON.
5939
wave: gravity
A WAVE whose VELOCITY of propagation is controlled primarily by GRAVITY. Water waves of length greater than 2 INCHES are considered gravity ... more
A WAVE whose VELOCITY of propagation is controlled primarily by GRAVITY. Water waves of length greater than 2 INCHES are considered gravity waves.
5940
wave: ground
That portion of a RADIO WAVE in proximity to and affected by the GROUND, being somewhat refrac­ted by the lower ATMOSPHERE, diffracted by th... more
That portion of a RADIO WAVE in proximity to and affected by the GROUND, being somewhat refrac­ted by the lower ATMOSPHERE, diffracted by the surface of the EARTH and retarded by the resistivity of the EARTH. Such a WAVE travels more or less parallel to the sur­face of the EARTH. See WAVE: SKY.