Madreporaria

from The Century Dictionary.

• noun A general name of the madrepores and related corals which are hexacoralline or hexactinoid and have a continuous hard calcareous skeleton.

from the GNU version of the Collaborative International Dictionary of English.

• noun plural (Zoöl.) An extensive division of Anthozoa, including most of the species that produce stony corals. See Illust. of anthozoa.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun stony corals