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n.1.(Zool.) The second segment of one of the Gregarinæ.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
Trophozoites in the cephaline gregarines assume a substructure in which a small part of the anterior end, the protomerite, is delimited from the nucleated posterior portion, the deuteromerite, by a septum (Perkins, 1991).