1. nacre

noun. the iridescent internal layer of a mollusk shell.


  • shell


  • nacre (French)
  • nacchara (Latin)

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Sentences with nacre

1. Noun, singular or mass
Cut your desired button shape into your sheet of paper, add a thin layer of glue from your glue stick, and attach the shape pattern to the nacre.

2. Adverb
Oysters normally make pearls as a by-product of their internal defenses – when a grain of sand penetrates the mollusk’s shell, the oyster deposits layer after layer of a substance called nacre around the trespassing debris.

3. Adjective
When an intruder bores into the oyster shell, the oyster reacts by covering it with nacre, producing a pearl.