| n. | 1. | (Min.) A mineral occurring in rhombic prisms, generally yellowish and pellucid, also colorless, and of greenesh, bluish, or brownish shades. It sometimes occurs massive and opaque. It is a fluosilicate of alumina, and is used as a gem. | |||
| 2. | (Zool.) Either one of two species of large, brilliantly colored humming birds of the genus Topaza (Topaza pella or Topaza pyra), of South America and the West Indies.
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| Noun | 1. | topaz - a yellow quartz Synonyms: common topaz, false topaz |
| 2. | topaz - a mineral (fluosilicate of aluminum) that occurs in crystals of various colors and is used as a gemstone | |
| 3. | topaz - a light brown Synonyms: tan |
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