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Total record count: 6269.

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	Eng ID	Term	Definition
	2581	isobathytherm	A line or surface showing the DEPTHS in OCEANS or LAKES at which points have the same temperature. Isobathytherms are usually drawn to sho... more A line or surface showing the DEPTHS in OCEANS or LAKES at which points have the same temperature. Isobathytherms are usually drawn to show cross sections of the water mass.
	2582	isobront	Line joining, on a CHART, places on the EARTH's surface where, on a given day, the first clap of THUNDER has been heard simultaneously. In ... more Line joining, on a CHART, places on the EARTH's surface where, on a given day, the first clap of THUNDER has been heard simultaneously. In CLIMATOLOGY, line drawn on a CHART through places which have the same average number of days on which THUNDER is heard in a given period.
	2583	isocentre	The unique point common to the plane of a PHOTOGRAPH, its PRINCIPAL PLANE, and the plane of an assumed truly VERTICAL PHOTOGRAPH taken from ... more The unique point common to the plane of a PHOTOGRAPH, its PRINCIPAL PLANE, and the plane of an assumed truly VERTICAL PHOTOGRAPH taken from the same CAMERA STATION and having an equal PRINCIPAL DISTANCE. The point of intersection on a PHOTOGRAPH of the true PRINCIPAL LINE and the ISOMETRIC PARALLEL. The point on a PHOTOGRAPH intersected by the bisector of the angle between the PLUMB LINE and the photograph perpendicular. The isocentre is significant because it is the centre of radiation for DISPLACEMENTS of IMAGES caused by TILT.
	2584	isoclinal (or isoclinic)	(adj.). Of or pertaining to equal MAGNETIC DIP.
	2585	isoclinal	n.). See ISOCLINAL LINE.
	2586	isoclinal (or isoclinic) line	A line connecting points of equal MAGNETIC DIP. Also called isoclinal.
	2587	isodynamic	(adj.). Of or pertaining to equality of force.
	2588	isodynamic line	A line connecting points of equal MAGNETIC INTENSITY, either the total or any component.
	2589	isogon	Line which is the locus of points at which the DIRECTION OF WIND is the same.
	2590	isogonal (or isogonic)	(adj.). Having equal angles.
	2591	isogonal (or isogonic)	(n.). See ISOGONIC LINE.
	2592	isogonic line	A line connecting points of equal magnetic VARIATION. Also called isogonal (or isogonic).
	2593	isogram	That line on a CHART or DIAGRAM connecting points having equal values of same PHENOMENON.
	2594	isogriv	A line connecting points of equal GRID VARIATION.
	2595	isohaline (or isohalsine)	A line connecting points of equal SALINITY in the OCEAN.
	2596	isohalsine	See ISOHALINE.
	2597	isolated danger mark	In the IALA Maritime Buoyage System a NAVIGATION MARK erected on, moored over, or placed immediately adjacent to an isolated danger of limi... more In the IALA Maritime Buoyage System a NAVIGATION MARK erected on, moored over, or placed immediately adjacent to an isolated danger of limited extent, which has NAVIGABLE WATER all around it.
	2598	isoline	A line representing the intersection of the plane of a VERTICAL PHOTOGRAPH with the plane of an overlapping OBLIQUE PHOTOGRAPH. If the VERTI... more A line representing the intersection of the plane of a VERTICAL PHOTOGRAPH with the plane of an overlapping OBLIQUE PHOTOGRAPH. If the VERTICAL PHOTOGRAPH were tilt-free, the isoline would be the ISOMETRIC PARALLEL of the OBLIQUE PHOTOGRAPH.
	2599	isomagnetic	(adj.). Of or pertaining to lines connecting points of equality in some MAGNETIC ELEMENT.
	2600	isomagnetic	(n.). See ISOMAGNETIC LINE.
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