1) Female lover of Apollo 2) Greek girl name 
prickle
• (n.) A prickle. • (n.) A spine or prickly fin. • (n.) The vertebral column; the spinous process of a vertebra.
(ә-kan´thә) spine (def. 1). spinous process of vertebra.
A·can'tha noun [ Greek ... thorn, from ... point. See Acute .] 1. (Botany) A prickle. 2. (Zoology) A spine or prickly fin. 3. (Anat.) The vertebral column; the spinous process of a vertebra. Dunglison. 
Type: Term Pronunciation: ă-kan′thă Definitions: 1. A spine or spinous process. 2. The spinous process of a vertebra.
acantha (s) ; acanthae (pl) 1. A sharp spiny part of a structure, such as the spinous process of a vertebra. 2. The spine. 3. In biology, a thorn-like structure or spiny protrusion on a plant or animal.