WordWeb Online

1. Reflect light or colours like an opal
   "Distant clouds opalesce like pale brocade"; "raindrops caught in a sunbeam seem to opalesce"
    
2. Exhibit a play of colours like that of an opal
   "This nitrate opalesces under certain conditions"

Derived forms: opalesced, opalescing, opalesces

See also: opalescence, opalescent

Type of: iridesce, reflect, shine