Definition EN: white or yellowish light which spreads out, in the night sky, more or less along the zodiac from the horizon on the side on which the Sun is hidden.

Definition FR: lueur blanche ou jaunâtre s'étalant plus ou moins, sur le ciel nocturne, le long du zodiaque, à  partir de l'horizon du côté duquel se trouve caché le Soleil.

Definition EN: (a) component along a line of latitude, towards east or west, of an atmospheric circulation. (b) Atmospheric circulation along, or approximately along, parallels of longitude.

Definition FR: a) composante le long d'un parallèle terrestre, vers l'est ou vers l'ouest, d'une circulation atmosphérique. b) circulation atmosphérique le long, au moins approximativement, des parallèles terrestr es.

Definition EN: (a) component along a line of latitude, towards east or west, of an atmospheric circulation. (b) Atmospheric circulation along, or approximately along, parallels of longitude.

Definition FR: a) composante le long d'un parallèle terrestre, vers l'est ou vers l'ouest, d'une circulation atmosphérique. b) circulation atmosphérique le long, au moins approximativement, des parallèles terrestr es.

Definition EN: (a) component along a line of latitude, towards east or west, of an atmospheric circulation. (b) Atmospheric circulation along, or approximately along, parallels of longitude.

Definition FR: a) composante le long d'un parallèle terrestre, vers l'est ou vers l'ouest, d'une circulation atmosphérique. b) circulation atmosphérique le long, au moins approximativement, des parallèles terrestr es.

Definition EN: circulation index relating to the west-east component of the atmospheric circulation, often considered between about 35 degrees and 65 degrees latitude.

Definition FR: indice de circulation s'appliquant à  la composante ouest-est de la circulation atmosphérique, considérée souvent entre 35 degrés et 65 degrés de latitude environ.

Definition FR: mécanismes dynamiques entraînant l'ozone atmosphérique dans le sens de la rotation de la Terre

Definition EN: a soil having well developed characteristics reflecting the full influence of the prevailing climate,fauna and flora,and therefore characteristic of that climatic zone

Definition FR: sol comportant des caractères bien développés, qui reflètent l'influence prédominante du climat, de la faune et de la flore, et qui est par conséquent bien caractéristique de la zone climatique où il s'est formé

Definition EN: a layer of soil approximately parallel to the land surface and differing from adjacent genetically related layers in physical,chemical,and biological properties or characteristics such as colour,structure,texture,consistency,kinds and numbers of organisms present,degree of acidity or alkalinity

Definition EN: that part of the lithosphere in which all rocks are under stresses exceeding their elastic limits.In it the rocks undergo permanent deformation and are said to flow,hence in this zone interstices are absent or insignificant

Definition EN: that part of the lithosphere in which the functional interstices of permeable rock or earth are completely filled with water under positive hydrostatic pressure,that is,pressure in excess of atmospheric pressure.It is the portion of the lithosphere that supplies water to springs and wells and which contains the ground water.Strictly speaking,part of the capillary zone is also saturated

Definition FR: partie de la lithosphère où les interstices des roches ou des terres perméables sont complètement remplis d'eau

Definition EN: an area in a watercourse where sediment settles out

Definition FR: surface sur laquelle les alluvions se déposent

Definition EN: the local mean time of a reference or zone meridian whose time is kept throughout a designated zone

Definition EN: Greenwich mean time

Definition FR: heure du méridien de Greenwich