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polar front
polar front zone of transition between polar and tropical air masses . Its average position during the winter is at about 30° lat. and during the summer at about 60° lat. In the N Atlantic Ocean, for example, the polar front can often be traced as a continuous line extending over thousands...
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front
front in meteorology, zone of transition between adjacent air masses . If a cold air mass is advancing to replace a warmer one, their mutual boundary is termed a cold front; if the reverse, then the boundary is termed a warm front, whereas a stationary front indicates that no relative advance of e...
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portico
portico , roofed space using columns or posts, generally included between a wall and a row of columns or between two rows of columns. In Greece the stoa was a portico of the first type; in Greek temples porticoes terminated the front and rear ends of the naos —called pronaos and opisthodome...
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sternum
sternum (breastbone) Flat, narrow bone extending from the base of the front of the neck to just below the diaphragm in the centre of the chest. The top attaches by ligaments to the collarbones and the centre part joins to the ribs by seven pairs of costal cartilages....
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air mass
air mass large body of air within the earth's atmosphere in which temperature and humidity, although varying at different heights, remain similar throughout the body at any one height. Air masses form over parts of the earth's surface called source regions, which are large bodies of water or land...
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Algol
Algol , famous variable star in the constellation Perseus ; Bayer designation β Persei; 1992 position R.A. 3 h 07.7 m , Dec. +40°55′. Algol's variation in apparent magnitude , from 2.06 to 3.28, is due to the fact that it is an eclipsing binary star , with one component revolving...
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rabbit
rabbit name for herbivorous mammals of the family Leporidae, which also includes the hare and the pika . Rabbits and hares have large front teeth, short tails, and large hind legs and feet adapted for running or jumping. In most, the length of the ears is considerably greater than the width. Alt...
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cyclone
cyclone atmospheric pressure distribution in which there is a low central pressure relative to the surrounding pressure. The resulting pressure gradient, combined with the Coriolis effect , causes air to circulate about the core of lowest pressure in a counterclockwise direction in the Northern He...
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naos
naos , inner portion of a Greek temple, enclosed within walls and generally surrounded by colonnaded porticoes. In it stood the statue of the deity to whom the temple was consecrated. The naos was provided with a columned porch, typically only in front (pronaos) but often also at the back (opisthodo...
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Front de Libération du Québec
Front de Libération du Québec (FLQ) , Canadian separatist group formed in the 1960s to bring about the independence of Quebec, which has a French heritage, from the rest of Canada, which has a primarily British tradition. Using public demonstrations and terrorist activities, the FLQ ...
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