What's the difference between acantha and acanthaceous?

Acantha

Definition:

• (n.) A prickle.
• (n.) A spine or prickly fin.
• (n.) The vertebral column; the spinous process of a vertebra.

Example Sentences:

• (1) The internal surface of the proventriculus is represented by numerous acanthae which fall close together.
• (2) Other cuticular structures, viz., scales, microtrichia, acanthae, and aedeagal spines, which occur on the terminalia are not innervated.

Acanthaceous

Definition:

• (a.) Armed with prickles, as a plant.
• (a.) Of, pertaining to, or resembling, the family of plants of which the acanthus is the type.

Example Sentences: