a clear to white liquid secreted by sea hares (genus Aplysia) that becomes viscous upon contact with water / (mineralogy) any of several minerals resembling opal, including a variety of yellow chalcedony

plural of opaline

Alternative spelling of opalize

simple past tense and past participle of opalise

present participle of opalise

Third-person singular simple present indicative form of opalise

plural of opalotype

(dated) A photograph taken on opalescent glass.

simple past tense and past participle of opalesce

To be opalescent; to give forth a play of colours, like the opal.