What's the difference between acantha and acanthi?

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.

Acanthi

Definition:

• (pl. ) of Acanthus

Example Sentences: