'Masseter' definitions:
Definition of 'masseter'
From: WordNet
noun
A large muscle that raises the lower jaw and is used in chewing
Definition of 'Masseter'
From: GCIDE
- Masseter \Mas"se*ter\, n. [NL., fr. Gr. ? a chewer, ? a muscle of the lower jaw used in chewing, from ? to chew: cf. F. mass['e]ter.] (Anat.) The large muscle which raises the under jaw, and assists in mastication. [1913 Webster]