CLAUSTRUM

claustrum

(noun) a layer of grey matter in the brain adjacent to the lenticular nucleus

Source: WordNet® 3.1

Etymology

Noun

claustrum (plural claustra)

(neuroanatomy) A thin, irregular sheet of grey matter underneath the inner part of the neocortex on both sides of the brains of mammals; its exact function is not understood, but it is believed to facilitate coordination between senses.

Source: Wiktionary

Claus"trum, n.; pl. Claustra. Etym: [L., a bolt or bar.] (Anat.)

Definition: A thin lamina of gray matter in each cerebral hemiphere of the brain of man.

– Claus"tral, a.

Source: Webster’s Unabridged Dictionary 1913 Edition