单词 | tail |
释义 | tail [tāl] AEROSPACE ENGINEERING 1. The rear part of a body, as of an aircraft or a rocket. 2. The tail surfaces of an aircraft or a rocket. ASTRONOMY The part of a comet that extends from the coma in a direction opposite to the sun; it consists of dust and gas that have been blown away from the coma by the solar wind and the sun's radiation pressure. ELECTRONICS 1. A small pulse that follows the main pulse of a radar set and rises in the same direction. 2. The trailing edge of a pulse. MATHEMATICS For a stochastic process represented by x(t1), x(t2),..., the process obtained by deleting the first n terms, for some n. VERTEBRATE ZOOLOGY 1. The usually slender appendage that arises immediately above the anus in many vertebrates and contains the caudal vertebrae. 2. The uropygium, and its feathers, of a bird. 3. The caudal fin of a fish or aquatic mammal. |
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