cup-shaped structure of hardened bracts at the base of an acorn
a sucker on the feet of certain flies
造句
用作名詞(n.)
The nuts were originally described as being separate from the cupules except for the basal part, but the authors found a considerable portion of the nut to be adnate to the cupule. 原描述說堅果除基部外均與殼斗離生，但作者發現相當多的堅果是與殼斗貼生的。