sclerodermata

from The Century Dictionary.

• noun The squamate or scaly reptiles; reptiles proper, as distinguished from Malacodermata. Also Scleroderma.
• noun One of the divisions of Zoantharia, containing the stone-corals or madrepores. See cuts under brain-coral, coral, Madrepora, and madrepore.
• noun A suborder of the cosomatous pteropods, represented by the family Eurybiidæ.

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

• noun plural (Zoöl.) The stony corals; the Madreporaria.