| 单词 | pentagon |
| 释义 | pentagon —pentagonal /pen tag"euh nl/, adj. —pentagonally, adv. /pen"teuh gon'/, n. 1. a polygon having five angles and five sides. 2. the Pentagon, a. a building in Arlington, Virginia, having a plan in the form of a regular pentagon, containing most U.S. Defense Department offices. b. the U.S. Department of Defense; the U.S. military establishment. [1560-70; < LL pentagonum < Gk pentágonon, n. use of neut. of pentágonos five-angled. See PENTA-, -GON] |
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