the world > the earth > structure of the earth > constituent materials > rock > concretion or petrifaction > [noun] > coral (12)
A hard calcareous substance consisting of the continuous skeleton secreted by many tribes of marine… Historically, and in earlier literature and…
any of various red gorgonian corals of the genus Corallium; esp. C. nobile of the Mediterranean and Pacific, which is used in jewellery.
deep red coral; esp. = red coral n. at red, adj. n.compounds 1e(a).
= coral, n.1 (the calcareous substance).