'Tergum' definitions:

Definition of 'Tergum'

From: GCIDE
  • Tergum \Ter"gum\, n.; pl. Terga. [L., the back.] (Zool.) (a) The back of an animal. (b) The dorsal piece of a somite of an articulate animal. (c) One of the dorsal plates of the operculum of a cirriped. [1913 Webster]