placophoran
/pləˈkɒf(ə)rən/Zoology rare
adjective
Of or relating to the former molluscan division Placophora, now usually identified with the class Polyplacophora, which comprises the chitons.
noun
A mollusc of the former division Placophora; a polyplacophoran.
Origin
Late 19th century; earliest use found in The Century Dictionary. From scientific Latin Placophora, class or division name + -an. With use as adjective compare placophorous.