Aculeus

[ә'kju:liәs]

(noun.) a sharp-pointed process especially a sting of a hymenopterous insect.

(noun.) a stiff sharp-pointed plant process.

整理:洛厄尔--From WordNet

(n.) A prickle growing on the bark, as in some brambles and roses.

(n.) A sting.

杰克逊整理