opal
opal is defined in Webster's Unabridged Dictionary (1913) with 1 sense, and appears in Roget's Thesaurus (1911) with 27 related terms. The full text of each entry is reproduced verbatim below.
Definitions
- 1.A mineral consisting, like quartz, of silica, but inferior to quartz in hardness and specific gravity. Note: The precious opal presents a peculiar play of colors of delicate tints, and is highly esteemed as a gem. One kind, with a varied play of color in a reddish ground, is called the harlequin opal. The fire opal has colors like the red and yellow of flame. Common opal has a milky appearance. Menilite is a brown impure variety, occurring in concretions at Menilmontant, near Paris. Other varieties are cacholong, girasol, hyalite, and geyserite.
Source: Webster's Unabridged Dictionary, 1913 edition (public domain, via GCIDE / Project Gutenberg).
Synonyms
Related terms (Roget's 1911)
- cloud
- film
- frosted
- gauze
- jewel
- mica
- milkiness
- milky
- mist
- mother-of-pearl
- muslin
- nacre
- nacreous
- opalesce
- opalescence
- opalescent
- opaline
- pearly
- semidiaphanous
- semiopacous
- semiopaque
- semipellucid
- semitransparency
- semitransparent
- translucency
- translucent
- turbidity
Source: Roget's Thesaurus, 1911 edition (public domain, via Project Gutenberg eBook #10681).
Related questions
Sources
- Definitions: Webster's Unabridged Dictionary, 1913 edition (public domain, via GCIDE / Project Gutenberg).
- Synonyms & antonyms: Roget's Thesaurus, 1911 edition (public domain, via Project Gutenberg eBook #10681).
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