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Eng ID Term Definition
3001
lurch
A sudden ROLL to one side. See LIST.
3002
lux
Unit of ILLUMINATION in the SI SYSTEM.
3003
L-Z graph
A graph used to determine 'in situ' DEPTHS of oceanographic OBSERVATIONS by the wire depths minus THERMOMETRIC DEPTH method.
3004
madrepore
A branching or stag-horn CORAL, also any perforated stone coral.
3005
magenta
adj.). A mixture of red and blue in equal parts.
3006
magma
The molten material in a state of fusion under the CRUST of the EARTH from which IGNEOUS ROCKS are formed.
3007
magnet
A body which produces a MAGNETIC FIELD around itself. It has the property of attracting certain materials capable of being mag­netized. See ... more
A body which produces a MAGNETIC FIELD around itself. It has the property of attracting certain materials capable of being mag­netized. See HEELING MAGNET.
3008
magnetic annual change
The amount of SECULAR CHANGE in the EARTH'S MAGNETIC FIELD which occurs in one YEAR. Also referred to as annual change.
3009
magnetic annual variation
The small systematic TEMPO­RAL VARIATION in the EARTH'S MAGNETIC FIELD which occurs after the trend for SECULAR CHANGE has been removed from... more
The small systematic TEMPO­RAL VARIATION in the EARTH'S MAGNETIC FIELD which occurs after the trend for SECULAR CHANGE has been removed from the average monthly values. Also referred to as annual variation.
3010
magnetic anomaly
See LOCAL MAGNETIC DISTURBANCE.
3011
magnetic azimuth
See AZIMUTH.
3012
magnetic bearing
See BEARING.
3013
magnetic chart
See CHART.
3014
magnetic compass
See COMPASS.
3015
magnetic compensation
See COMPENSATION OF MAGNETIC COMPASS.
3016
magnetic compensator
See COMPENSATOR.
3017
magnetic course
See COURSE.
3018
magnetic daily (or diurnal) variation
OSCILLATIONS of the EARTH'S MAGNETIC FIELD which have a periodicity of about a day and that depend to a close approximation only on LOCAL TI... more
OSCILLATIONS of the EARTH'S MAGNETIC FIELD which have a periodicity of about a day and that depend to a close approximation only on LOCAL TIME and GEOGRAPHIC LATITUDE.
3019
magnetic declination
See VARIATION.
3020
magnetic deviation
See DEVIATION.