'Clypeus' definitions:

Definition of 'clypeus'

(from WordNet)
noun
A shield-like plate on the front of an insect's head

Definition of 'Clypeus'

From: GCIDE
  • Clypeus \Clyp"e*us\, n.; pl. Clypei. [L., a shield.] (Zool.) The frontal plate of the head of an insect. [1913 Webster]