caliculus vs complex body part

caliculus and complex body part both are nouns.

Word	Noun	Adjective	Verb	Adverb
caliculus	Yes	No	No	No
complex body part	Yes	No	No	No

As nouns, complex body part is a hypernym of caliculus; that is, complex body part is a word with a broader meaning than caliculus:

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

Other hypernyms of caliculus include anatomical structure, bodily structure, body structure, structure.

caliculus (noun)	complex body part (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