MASSETER Meaning of MASSETER in English [ ma'si:tə ]■ noun Anatomy a muscle which runs through the rear part of the cheek and acts to close the jaw in chewing.OriginC16: from Gk masētēr , from masasthai 'to chew'. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004