coral

1. (countable) Any of many species of marine invertebrates in the class Anthozoa, most of which build hard calcium carbonate skeletons and form colonies, or a colony belonging to one of those species.countable

2. (uncountable) A hard substance made of the skeletons of these organisms.uncountable

3. (countable) A somewhat yellowish orange-pink color; the color of red coral (Corallium rubrum) of the Mediterranean Sea, commonly used as an ornament or gem.Examples: "The coral faded even from her lips, till they were as white as Leo's face, and quivered pitifully."countable

4. (historical) A piece of coral, usually fitted with small bells and other appurtenances, used by children as a plaything.Examples: "On the very chair which I used to occupy when I was at work Marian was sitting now, with the child industriously sucking his coral upon her lap."countablehistoricaluncountable