optic cup vs caliculus

optic cup and caliculus both are nouns.

Word	Noun	Adjective	Verb	Adverb
optic cup	Yes	No	No	No
caliculus	Yes	No	No	No

As nouns, caliculus is a hypernym of optic cup; that is, caliculus is a word with a broader meaning than optic cup:

optic cup: (embryology) a two-walled cuplike depression that develops into the pigmented and sensory layers of the retina
caliculus: a small cup-shaped structure (as a taste bud or optic cup or cavity of a coral containing a polyp)

Other hypernyms of optic cup include calycle, calyculus.

optic cup (noun)	caliculus (noun)
(embryology) a two-walled cuplike depression that develops into the pigmented and sensory layers of the retina	a small cup-shaped structure (as a taste bud or optic cup or cavity of a coral containing a polyp)