a. [ L. aculeatus, fr. aculeus, dim. of acus needle. ] 1. (Zool.) Having a sting; covered with prickles; sharp like a prickle. [ 1913 Webster ]
2. (Bot.) Having prickles, or sharp points; beset with prickles. [ 1913 Webster ]
3. Severe or stinging; incisive. [ R. ] Bacon. [ 1913 Webster ]
a. Having a sharp point; armed with prickles; prickly; aculeate. [ 1913 Webster ]