Found 2 items, similar to aculeus.
English → English (WordNet) Definition: aculeus aculeus n 1: a stiff sharp-pointed plant process 2: a sharp-pointed process especially a sting of a hymenopterous insect
English → English (gcide) Definition: Aculeus Aculeus \A*cu"le*us\, n.; pl. Aculei. [L., dim. of acus needle.] 1. (Bot.) A prickle growing on the bark, as in some brambles and roses. --Lindley. [1913 Webster] 2. (Zo["o]l.) A sting. [1913 Webster]