Source : Webster's Revised Unabridged Dictionary (1913)

Opaline \O"pal*ine\, n.
   1. An opaline variety of yellow chalcedony.

   2. Opal glass.

   3. An opaline color or expanse.

Opaline \O"pal*ine\, a. [Cf. F. opalin.]
   Of, pertaining to, or like, opal in appearance; having
   changeable colors like those of the opal.

Source : WordNet®

opaline
     adj : 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" [syn: {iridescent}, {nacreous},
            {opalescent}, {pearlescent}]