‖n. [ Gr. &unr_; thorn, fr. &unr_; point. See Acute. ] 1. (Bot.) A prickle. [ 1913 Webster ]

2. (Zool.) A spine or prickly fin. [ 1913 Webster ]

3. (Anat.) The vertebral column; the spinous process of a vertebra. Dunglison. [ 1913 Webster ]

a. 1. Armed with prickles, as a plant. [ 1913 Webster ]

2. (Bot.) Of, pertaining to, or resembling, the family of plants of which the acanthus is the type. [ 1913 Webster ]