acantha Meaning, Definition & Usage

  1. noun any sharply pointed projection
    spine; spur.

WordNet

A*can"tha noun
Etymology
Gr. thorn, fr. point. See Acute.
Definitions
  1. (Bot.) A prickle.
  2. (Zoöl.) A spine or prickly fin.
  3. (Anat.) The vertebral column; the spinous process of a vertebra. Dunglison.

Webster 1913