from The Century Dictionary and Cyclopedia
- n. A natural mixture of opal and agate. The agate contains a part of opal silica, that is, chalcedony silica and opal silica, the latter having five, or more, per cent. of combined water. Opal-agate occasionally replaces wood in fossilization.
Sorry, no etymologies found.
Sorry, no example sentences found.
Wordnik is becoming a not-for-profit! Read our announcement here.