The Collaborative International Dictionary of English v.0.48:
madriporian coral \madriporian coral\ n. A madrepore . [PJC] MadreporianWordNet (r) 3.0 (2006):
madriporian coral n 1: corals having calcareous skeletons aggregations of which form reefs and islands [syn: stony coral, madrepore, madriporian coral]