Opaline

adj, noun

adj, noun ·3 syllables ·Uncommon ·Advanced level

Definitions

Noun
  1. 1
    A clear to white liquid secreted by sea hares (genus Aplysia) that becomes viscous upon contact with water. countable, uncountable

    "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. 2
    Any of several minerals resembling opal, including a variety of yellow chalcedony. countable, uncountable
  3. 3
    Synonym of opal glass. countable, uncountable
Adjective
  1. 1
    Resembling opal in having a milky white iridescence.

    "She was so alive that night, opaline points in her eyes, mouth parted to bare her teeth."

Adjective
  1. 1
    having a play of lustrous rainbow colors wordnet

Synonyms

All synonyms
glassiridescentmoirenacreousopal glassopalescent

Example

More examples

"Something that is opaline looks like opal."

Etymology

From opal + -ine.

Related phrases

opal glasssea hare

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.