coral reef

English Thesaurus

1. a reef consisting of coral consolidated into limestone (noun.object)

hypernym	:	reef,
definition	:	a submerged ridge of rock or coral near the surface of the water (noun.object)

hyponym	:	atoll,
definition	:	an island consisting of a circular coral reef surrounding a lagoon (noun.object)

hyponym	:	barrier reef,
definition	:	a long coral reef near and parallel to the shore (noun.object)

hyponym	:	cay, florida key, key,
definition	:	a coral reef off the southern coast of Florida (noun.object)

instance hyponym	:	great barrier reef,
definition	:	the largest coral reef in the world; in the Coral Sea off the northeastern coast of Australia (noun.object)