Opaline Definition

ōpəlēn, ōpəlīn, ōpəlin
adjective
Of or like opal.
Webster's New World
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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.
Wiktionary

(mineralogy) Any of several minerals resembling opal.

Wiktionary
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Other Word Forms of Opaline

Noun

Singular:
opaline
Plural:
opalines

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