From The Collaborative International Dictionary of English v.0.44 [gcide]:
Aculeate \A*cu"le*ate\, adjective [L. aculeatus, fr. aculeus, dim. of acus needle.]
1. (Zo["o]l.) Having a sting; covered with prickles; sharp like a prickle.
2. (Bot.) Having prickles, or sharp points; beset with prickles.
3. Severe or stinging; incisive. [R.] --Bacon.
From WordNet (r) 2.0 [wn]:
adjective
1: having or resembling a stinger or barb; "aculeate insects such as bees and wasps" [syn: {aculeated}]
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