acantha

Noun

Synonyms: spur spine

WordNet 3.0

Acantha \A*can"tha\, n. [Gr. ? thorn, fr. ? 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]