opaline

About 0.05 uses per million words.

Meaning

1. adjective Resembling opal in having a milky white iridescence.
2. noun 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.

3. noun Any of several minerals resembling opal, including a variety of yellow chalcedony.
4. noun Synonym of opal glass.

Similar words

opalescent pearlescent nacreous iridescent bright lustres opalesque opalic semiopalescent alabaster

Often followed by

silica glass and tints green gland light mist cherts