| 单词 | polar |
| 释义 | polar 1. adj. a of or near a pole of the earth or a celestial body, or of the celestial sphere. b (of a species or variety) living in the north polar region. 2. having magnetic polarity. 3. a (of a molecule) having a positive charge at one end and a negative charge at the other. b (of a compound) having electric charges. 4. Geom. of or relating to a pole. 5. directly opposite in character or tendency. Phrases and idioms polar bear a white bear, Ursus maritimus, of the Arctic regions. polar body a small cell produced from an oocyte during the formation of an ovum, which does not develop further. polar circle each of the circles parallel to the equator at a distance of 23��27 Usage from either pole. polar coordinates a system by which a point can be located with reference to two angles. polar curve a curve related in a particular way to a given curve and to a fixed point called a pole. polar distance the angular distance of a point on a sphere from the nearest pole. polar star = POLESTAR. Derivatives polarly adv. Etymology: F polaire or mod.L polaris (as POLE(2)) |
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