Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A mineral which is opaque in its natural state, but is said to change its color and become transparent by heat.

from the GNU version of the Collaborative International Dictionary of English

  • n. A mineral which is opaque in its natural state, but is said to change its color and become transparent by heat.

from The Century Dictionary and Cyclopedia

  • n. A kind of opal (hydrophane) which by the absorption of melted wax is rendered translucent so long as it is hot, but becomes opaque again on cooling.

Etymologies

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Examples

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