keyhole urchin

Noun

Meaning

keyhole urchin (plural keyhole urchins)

Any of numerous clypeastroid sea urchins (sand dollars) of the genera Melitta, Rotula and Encope, with one or more perforations resembling keyholes.

Source: en.wiktionary.org

Close letter words and terms

keyhole operation keyhole saw keyhole surgery keyhole wound keyholing keying