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单词 placophoran
释义

placophoranadj.n.

Brit. /pləˈkɒf(ə)rən/, U.S. /pləˈkɑf(ə)r(ə)n/
Origin: A borrowing from Latin, combined with an English element. Etymons: Latin Placophora , -an suffix.
Etymology: < scientific Latin Placophora, class or division name (H. von Ihering 1876, in Jahrb. d. Deut. Malakozool. Ges. 3 136; < placo- placo- comb. form + -phora : see -phore comb. form) + -an suffix. With use as adjective compare placophorous adj.
Zoology. rare.
A. adj.
Of or relating to the former molluscan division Placophora, now usually identified with the class Polyplacophora, which comprises the chitons.
ΚΠ
1890 Cent. Dict. Placophoran, placophorous; belonging to the Placophoræ.
1980 Malacologia 19 259 (caption) Primitive Conchifera with further concentration of the placophoran dorsoventral musculature.
B. n.
A mollusc of the former division Placophora; a polyplacophoran.
ΚΠ
1890 Cent. Dict. Placophoran,..a member of the Placophora; a chiton.
1920 Amer. Naturalist 54 84 A pronounced color difference, correlated with sex,..has been found in the commonest placophoran at Bermuda, Chiton tuberculatus Linné.
1987 Philos. Trans. (Royal Soc.) B. 315 38 Compared with the distinctly prominent osphradia of prosobranch gastropods, the osphradia of placophorans and bivalves are only weakly developed.
This entry has been updated (OED Third Edition, June 2006; most recently modified version published online March 2022).
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adj.n.1890
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