calyculus vs body structure

calyculus and body structure both are nouns.

Word	Noun	Adjective	Verb	Adverb
calyculus	Yes	No	No	No
body structure	Yes	No	No	No

As nouns, body structure is a hypernym of calyculus; that is, body structure is a word with a broader meaning than calyculus:

calyculus: a small cup-shaped structure (as a taste bud or optic cup or cavity of a coral containing a polyp)
body structure: a particular complex anatomical part of a living thing and its construction and arrangement

Other hypernyms of calyculus include anatomical structure, bodily structure, complex body part, structure.

calyculus (noun)	body structure (noun)
a small cup-shaped structure (as a taste bud or optic cup or cavity of a coral containing a polyp)	a particular complex anatomical part of a living thing and its construction and arrangement
a group of bracts simulating a calyx as in a carnation or hibiscus