1. Having an iridescent lustre. Nacreous shells, those which have an exterior or interior layer of mother-of-pearl.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• naceous,
• narious,
• numreous,
• acerous,
• naurous,
• caceous,
• cereceous,
• bacreous,
• macreous,
• jacreous,
• acreous,
• nacrous,
• nacerous,
• encarpous,
• Farreous,
• noiveous,
• nivveous,
• sacrous,
• tartreous,
• acceous

The adjective form of the word "nacreous" is "nacreous".

The plural form of the word "nacreous" is "nacreous". The word does not change in its plural form.

The singular form of the word "nacreous" is "nacre"