nacre
noun
1.
the iridescent internal layer of a mollusk shell
Origin
Borrowed from Middle French nacre, from Medieval Latin nacchara, ultimately derived from Arabic نَقَّارَة (naqqāra). Doublet of nagara, nagada, naqareh, and naker. Also present in nacarat.
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Broader terms
WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.