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Total record count: 6269.

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	Eng ID	Term	Definition
	1961	friction layer	Atmospheric LAYER extending from the EARTH's surface and of depth about 600 to 800 m, within which air motion is affected significantly by s... more Atmospheric LAYER extending from the EARTH's surface and of depth about 600 to 800 m, within which air motion is affected significantly by surface friction. Above this LAYER lies the 'FREE ATMOSPHERE'.
	1962	fringing reef	A REEF closely attached to a SHORE, as contrasted with a BARRIER REEF which is separated from the SHORE by a LAGOON.
	1963	front	In METEOROLOGY: a) surface of separation of two AIR MASSES (frontal surface); b) line of intersection of the surface of separation of two AI... more In METEOROLOGY: a) surface of separation of two AIR MASSES (frontal surface); b) line of intersection of the surface of separation of two AIR MASSES with another surface or with the GROUND.
	1964	frontal surface	See FRONT.
	1965	front light	See LIGHT(S): RANGE.
	1966	front nodal point	See NODAL POINT.
	1967	frost (or freezing)	Lowering of air temperature to a value equal to or less than the FREEZING POINT of water (0°C).
	1968	frost point	The temperature to which atmospheric moisture must be cooled to reach the point of saturation with respect to ice.
	1969	frost smoke	Fog-like CLOUDS, due to the contact of cold air with relatively warm SEA WATER, which appear over newly formed LEADS and POOLS, or leeward, ... more Fog-like CLOUDS, due to the contact of cold air with relatively warm SEA WATER, which appear over newly formed LEADS and POOLS, or leeward, of the ICE EDGE, and which may persist while SLUSH or SLUDGE and YOUNG ICE are forming.
	1970	f-stop	See APERTURE: RELATIVE.
	1971	fucus	See ROCKWEED.
	1972	full moon	See PHASES OF THE MOON.
	1973	function key	A special key on a computer which performs a preprogrammed function.
	1974	fundamental circle	See PRIMARY GREAT CIRCLE.
	1975	furrow	On the seafloor, a closed, linear, narrow, shallow depression.
	1976	fusion: stereoscopic	See STEREOSCOPIC FUSION.
	1977	gage	See GAUGE: TIDE.
	1978	gain	The ration of output voltage, current or power to input voltage, current, or power in electronic instruments.
	1979	gal	(Derived from Galileo). The unit of ACCELERATION in the CGS SYSTEM. See MILLIGAL.
	1980	gale	WIND with a SPEED between 32 and 37 KNOTS (Beaufort scale wind force 8).
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