Definitions for "Nacre"
A pearly substance which lines the interior of many shells, and is most perfect in the mother-of-pearl.
Having the peculiar iridescence of nacre, or mother-of-pearl, or an iridescence resembling it; as, nacré ware.
The iridescent substance secreted by a mollusk during the formation of a pearl that consists of layers of aragonite and calcite crystals.