trapezius muscle is a noun meaning "either of two flat triangular muscles of the shoulder and upper back that are involved in moving the shoulders and arms". It carries one recorded sense.
either of two flat triangular muscles of the shoulder and upper back that are involved in moving the shoulders and arms
Definitions, synonyms and semantic relations for trapezius muscle come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.