A hard, stony substance secreted by certain marine coelenterates as an external skeleton, typically forming large reefs in warm seas. The Great Barrier Reef is the world's largest coral reef system.
A piece of coral, especially a red one, used in jewelry. She wore a beautiful necklace made of red coral.
A pinkish-orange color, resembling the hue of some corals. The walls of the living room were painted in a soft coral shade.
Any of numerous colonial marine invertebrates of the class Anthozoa that secrete a calcareous skeleton and form reefs or islands. Corals thrive in warm, shallow waters where sunlight can penetrate.