monoplacid a. [Gr. monos, one; plax, flat plate] Having only one plate.
Monoplacophora, monoplacophorans n., n.pl. [Gr. monos, one; plax, flat plate; pherein, to carry] A class of Mollusca mostly extinct, with a limpet-like, cap-shaped, cone-shaped or spoon-shaped shell with serially paired muscle scars.
monoploid a. [Gr. monoploos, onefold] 1. Any somatic cell or individual with one set of chromosomes. 2. Having the basic number of chromosomes in a polyploid series. see euploid, aneuploid.
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