"Needle-shaped, acicular. Also: (a) covered with or bearing aciculae; (b) marked as if scratched with a needle ( rare )", Mid 19th cent.; earliest use found in William Macgillivray (1796–1852), ornithologist and natural historian. From acicula + -ate, originally after French aciculé. Compare scientific Latin aciculatus.[aciculate etymology, aciculate origin, 英语词源]