This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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adj. resembling opal in its iridescence

n. any of several minerals resembling opal

adj. Of, pertaining to, or like, opal in appearance; having changeable colors like those of the opal.

n. An opaline variety of yellow chalcedony.

n. Opal glass.

n. An opaline color or expanse.

Pertaining to or like opal; also, like some property of the opal; specifically, having an iridescence like that of the opal; bluish-white, reflecting prismatic hues, as the wings of certain insects.

n. A semi-translucent glass, whitened by the addition of phosphate of lime, peroxid of tin, or other ingredients.

n. An opalina.

adj. having a play of lustrous rainbow colors

"His eyes were opaline, and he was built like a reed."

bright   

polypropylene   

roseate    mirrorlike    brownish-yellow    ashy    coppery    pearly    nacreous    amber-coloured    lucent    wind-power