opaline

1. (countable, uncountable)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. (countable, uncountable)Any of several minerals resembling opal, including a variety of yellow chalcedony.

3. (countable, uncountable)Synonym of opal glass.

1. Something that is opaline looks like opal.

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