/ ˈkɒrəl; NAmE ˈkɔːrəl; ˈkɑːrəl/ noun , adjective
■ noun
1.
[ U ] a hard substance that is red, pink or white in colour, and that forms on the bottom of the sea from the bones of very small creatures. Coral is often used in jewellery :
coral reefs / islands
a coral necklace
2.
[ C ] a creature that produces coral
■ adjective
pink or red in colour, like coral :
coral lipstick
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WORD ORIGIN
Middle English : via Old French from Latin corallum , from Greek korallion , kouralion .