REEF

Definitions

1. 1. A chain or range of rocks lying at or near the surface of the water. See Coral reefs, under Coral.
2. 2. A large vein of auriferous quartz; -- so called in Australia. Hence, any body of rock yielding valuable ore. Reef builder (Zoöl.), any stony coral which contributes material to the formation of coral reefs. -- Reef heron (Zoöl.), any heron of the genus Demigretta; as, the blue reef heron (D.jugularis) of Australia.