mammillary body vs mamillary body

mammillary body and mamillary body both are nouns.

Word	Noun	Adjective	Verb	Adverb
mammillary body	Yes	No	No	No
mamillary body	Yes	No	No	No

As nouns, mammillary body and mamillary body are synonyms defined as:

mammillary body and mamillary body: one of two small round structures on the undersurface of the brain that form the terminals of the anterior arches of the fornix

Other synonyms of mammillary body include corpus mamillare.

mammillary body (noun)	mamillary body (noun)
one of two small round structures on the undersurface of the brain that form the terminals of the anterior arches of the fornix	one of two small round structures on the undersurface of the brain that form the terminals of the anterior arches of the fornix