swallowtailn.
英 'swɒləʊteɪl | 美 'swɑlo,tel
中文n. 燕尾服；燕子尾巴；燕尾叉形旗子的末端
词根词源
swallowtail (n.)also swallow-tail, 1540s as a type of arrowhead, from swallow (n.1) + tail (n.). Of a type of butterfly, by 1776; of a type of coat, 1835. As an adjective from 1590s. The bird\\'s tail is long and deeply forked.
关键词