madreporiteMAD'REPORITE, n. A name given to certain petrified bones found in Normandy, in France, belonging to a cetaceous fish or to a species of crocodile. These bones contain many little brown lines in zigzag, resembling entangled threads. They have none of the properties of madrepore. MAD'REPORITE, n. A variety of limestone, so called on account of its occurring in radiated prismatic concretions resembling the stars of madrepores. When rubbed, it emits the smell of sulphurated hydrogen gas. |