Definitions of nacreous

  1. having a play of lustrous rainbow- like colors; " an iridescent oil slick"; " nacreous ( or pearlescent) clouds looking like mother- of- pearl"; " a milky opalescent ( or opaline) luster"
  2. consisting of or resembling mother- of- pearl
  3. Consisting of, or resembling, nacre; pearly.
  4. Having an iridescent lustre. Nacreous shells, those which have an exterior or interior layer of mother- of- pearl.
  5. Yielding or resembling mother- of- pearl.