Definition of: incus

(ing′kəs) noun plural in·cu·des (in·ky′dēz)
1. Anat. The central one of three small bones in the tympanum or middle ear; so called from its fancied resemblance to an anvil. See illustration under EAR.
2. Meteorol. The anvil–shaped upper part of a cumulonimbus cloud; an anviltop. [<L, anvil]
—in′cu·dal adjective