n.
Pronunciation: m ə - ' s ē -t ə r, ma-
Function: noun
Etymology: New Latin, from Greek mas ē t ē r, from masasthai to chew ― more at MANDIBLE
Date: 1578
: a large muscle that raises the lower jaw and assists in mastication
– mas · se · ter · ic \ ˌ ma-s ə - ' ter-ik \ adjective