noun. the iridescent internal layer of a mollusk shell.
- nacre (French)
- nacchara (Latin)
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.
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.
When an intruder bores into the oyster shell, the oyster reacts by covering it with nacre, producing a pearl.