Per′fo‐ra″ta (pẽr′fō̍‐rā″tȧ), n. pl. [NL. See Perforate.] (Zoöl.) (a) A division of corals including those that have a porous texture, as Porites and Madrepora; — opposed to Aporosa. (b) A division of Foraminifera, including those having perforated shells.
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Webster's Dictionary 1913
Webster's Revised Unabridged Dictionary, C. & G. Merriam Co., 1913.