rectus medialis vs medial rectus muscle

rectus medialis and medial rectus muscle both are nouns.

Word	Noun	Adjective	Verb	Adverb
rectus medialis	Yes	No	No	No
medial rectus muscle	Yes	No	No	No

As nouns, rectus medialis and medial rectus muscle are synonyms defined as:

rectus medialis and medial rectus muscle: the ocular muscle whose contraction turns the eyeball medially

Other synonyms of rectus medialis include medial rectus.

rectus medialis (noun)	medial rectus muscle (noun)
the ocular muscle whose contraction turns the eyeball medially	the ocular muscle whose contraction turns the eyeball medially