n. pl.1.(Zool.) A division of gastropod Mollusca, including the chitons. The back is covered by eight shelly plates. Called also Polyplacophora. See Illust. under Chiton, and Isopleura.
References in periodicals archive ?
Studien uber das Perinotum-Epithel und die Bildung der Kalkstacheln von Lepidochitona cinerea (L.) (Placophora).
Cirripedios en la dieta del molusco herbivoro Chiton granosus Frembly 1827 (Mollusca: Placophora) presente en el intermareal rocoso de Chile.
Fine structure of external 'genital" papillae in the freshwater mite Hydrovolzia placophora (Hydrovolziidae, Actinedida, Actinotrichida, Acari).