musculus pectoralis vs pectoralis

musculus pectoralis and pectoralis both are nouns.

Word	Noun	Adjective	Verb	Adverb
musculus pectoralis	Yes	No	No	No
pectoralis	Yes	No	No	No

As nouns, musculus pectoralis and pectoralis are synonyms defined as:

musculus pectoralis and pectoralis: either of two large muscles of the chest

Other synonyms of musculus pectoralis include pecs, pectoral, pectoral muscle.

musculus pectoralis (noun)	pectoralis (noun)
either of two large muscles of the chest	either of two large muscles of the chest