opaline

(noun, adjective)

adjective

1. having a play of lustrous rainbow colors

- a milky opalescent (or opaline) luster

Similar word(s): bright, iridescent, nacreous, opalescent, pearlescent

noun

1. a clear-to-white liquid secreted by sea hares (genus Aplysia) that becomes viscous upon contact with water

- The attack on a sea hare by a spiny lobster causes release of the whitish opaline, followed the co-release of both opaline and ink.

2. (mineralogy) any of several minerals resembling opal, including a variety of yellow chalcedony

3. opal glass