Entry 3 senses Webster, 1913

Incus

· In·cus · IPA /ˈɪŋ.kəs/

01 n. An anvil.

1.
An anvil.
2.
One of the small bones in the tympanum of the ear; the anvil bone. See Ear.(Anat.) See: Ear
3.
The central portion of the armature of the pharynx in the Rotifera.(Zool.)