noun
- a hard, iridescent substance that lines the inside of certain mollusk shells, especially oysters and mussels; mother-of-pearl
Examples
- The inside of the oyster shell was covered with a lustrous nacre.
- Nacre is used to make jewelry and decorative inlays.
- The pearl formed as the oyster secreted layers of nacre around an irritant.
- Buttons made from nacre have a beautiful pearlescent sheen.
- The nacre lining the abalone shell shimmered with rainbow colors.