Cingulum
Pronunciation : Cin"gu*lum
Part of Speech : n.
Etymology : [L., a girdle.] (Zo?l.) (a) A distinct girdle or band of color; a raised spiral line as seen on certain univalve shells. (b) The clitellus of earthworms. (c) The base of the crown of a tooth.
Source : Webster's Unabridged Dictionary, 1913