\A*cu"le*ate\, a. [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.