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Total record count: 6216.

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	Term	Terme français	Definition	Définition française
	loxodromic curve	NULL	A LOXODROME. A RHUMB LINE.	NULL
	lubber (or lubber's) line	Ligne de foi	A REFERENCE LINE on any direction-indicating instrument, marking the reading which coincides with the HEADING.	Lignefde foi. Ligne repère indiquant le CAP du navire sur un instrument de bord servant à observer les directions.
	lull	Accalmie	A momentary decrease in the SPEED of the WIND.	Accalmie.f Atténuation momentanée de la force du VENT.
	lumen	Lumen	The unit of LUMINOUS FLUX in the SI SYSTEM.	Lumen.m Unité de FLUX LUMINEUX du SYSTÈME INTERNATIONAL. Le symbole est lm.
	luminance (at a point of surface, in a direction)	Luminance	Quotient of the LUMINOUS INTENSITY, in a given direction, of an infinitesimal element of the surface containing the point under consider... more Quotient of the LUMINOUS INTENSITY, in a given direction, of an infinitesimal element of the surface containing the point under consideration, by the orthogonally projected area of the element on a plane perpendicular to the given direction.	Luminance.f En un point d’une surface et dans une direction donnée, quotient de l'INTENSITÉ LUMINEUSE d'un élément de cette surface,... more Luminance.f En un point d’une surface et dans une direction donnée, quotient de l'INTENSITÉ LUMINEUSE d'un élément de cette surface, par l'aire de la projection orthogonale de cet élément sur un plan perpendiculaire à cette direction. Elle s’exprime en candela par mètre carré.
	luminescence	Luminescence	Any emission of light at temperatures below that required for incandescence. See BIOLUMINESCENCE, FLUORESCENCE, PHOSPHORESCENCE.	Luminescence.f Propriété qu'ont certains corps d'émettre des radiations lumineuses lorsqu’ils reçoivent de l’énergie sous des for... more Luminescence.f Propriété qu'ont certains corps d'émettre des radiations lumineuses lorsqu’ils reçoivent de l’énergie sous des formes diverses, autres que l’apport de chaleur. Voir BIOLUMINESCENCE, FLUORESCENCE, PHOSPHORESCENCE.
	luminous flux	NULL	See FLUX.	NULL
	luminous intensity	NULL	See INTENSITY.	NULL
	luminous range	NULL	See RANGE.	NULL
	luminous signal	NULL	See SIGNAL.	NULL
	lunar day	NULL	See DAY.	NULL
	lunar distance	Distance lunaire	The angle, at an observer on the EARTH, between the MOON and another CELESTIAL BODY. This was the basis of a method formerly used to deter... more The angle, at an observer on the EARTH, between the MOON and another CELESTIAL BODY. This was the basis of a method formerly used to determine LONGITUDE at SEA.	Distanceflunaire. Angle, mesuré par un observateur à la surface de la TERRE, entre la LUNE et un autre CORPS CÉLESTE. La mesure des dist... more Distanceflunaire. Angle, mesuré par un observateur à la surface de la TERRE, entre la LUNE et un autre CORPS CÉLESTE. La mesure des distances lunaires était autrefois à la base d'une méthode de détermination de la LONGITUDE en mer.
	lunar eclipse	NULL	See ECLIPSE.	NULL
	lunar inequality	Inégalité lunaire (ou de la lune)	Variation in the MOON's motion in its ORBIT, due to attraction by other bodies of the SOLAR SYSTEM. See EVECTION, PERTURBATION. A minute flu... more Variation in the MOON's motion in its ORBIT, due to attraction by other bodies of the SOLAR SYSTEM. See EVECTION, PERTURBATION. A minute fluctuation of a MAGNETIC NEEDLE from its mean position, caused by the MOON.	Inégalitéflunaire(oude la lune). Irrégularité dans le mouvement orbital de la LUNE due à l'attraction d'autres CORPS CÉLESTES du SYS... more Inégalitéflunaire(oude la lune). Irrégularité dans le mouvement orbital de la LUNE due à l'attraction d'autres CORPS CÉLESTES du SYSTÈME SOLAIRE. Voir ÉVECTION, PERTURBATION.
	lunar month	NULL	See MONTH: SYNODICAL.	NULL
	lunar rainbow	NULL	See MOONBOW.	NULL
	lunar tide	NULL	See under TIDE.	NULL
	lunation	Lunaison	See MONTH: SYNODICAL.	Lunaison.fIntervalle de temps qui sépare deux NOUVELLES LUNES consécutives. Sa durée est d’environ 29 jours et demi (PÉRIODE SYNODIQUE... more Lunaison.fIntervalle de temps qui sépare deux NOUVELLES LUNES consécutives. Sa durée est d’environ 29 jours et demi (PÉRIODE SYNODIQUE), actuellement 29,530588 jours solaires moyens. On dit aussimois synodique. Voir aussi MOIS LUNAIRE.
	lunicurrent interval	NULL	The interval between the moon's transit (upper or lower) over the local or Greenwich meridian and a specified phase of the tidal current fol... more The interval between the moon's transit (upper or lower) over the local or Greenwich meridian and a specified phase of the tidal current following the transit. Examples are strength of flood interval and strength of ebb interval, which may be abbreviated to flood interval and ebb interval, respectively. The interval is described as local or Greenwich according to whether the reference is to the moon's transit over the local or Greenwich meridian. When not otherwise specified, the reference is assumed to be local.	NULL
	lunitidal interval	NULL	The interval of time between the TRANSIT (upper or lower) of the MOON over the LOCAL or GREENWICH MERIDIAN and the next HIGH WATER or LOW WA... more The interval of time between the TRANSIT (upper or lower) of the MOON over the LOCAL or GREENWICH MERIDIAN and the next HIGH WATER or LOW WATER at a place. The interval is assumed to be local unless otherwise specified. The average of all high water intervals is called mean high water lunitidal interval, high water interval, or corrected establishment. The average of all low water intervals is called mean low water lunitidal interval, or low water interval. The expressions higher high water interval, lower high water interval, higher low water interval, and lower low water interval are used when there is considerable DIURNAL INEQUALITY. See ESTABLISHMENT.	NULL
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