Definition of Tridimite
Trid"y*mite (?), n. [Gr. &?; threefold. So
called in allusion to the supposed threefold nature of the twin crystals.]
(Min.) Pure silica, like quartz, but crystallizing in hexagonal
tables. It is found in trachyte and similar rocks.
Trid"y*mite (?), n. [Gr. &?; threefold. So
called in allusion to the supposed threefold nature of the twin crystals.]
(Min.) Pure silica, like quartz, but crystallizing in hexagonal
tables. It is found in trachyte and similar rocks.
- Webster's Unabridged Dictionary (1913)
- A rare mineral of volcanic rocks that solidified at a high temperature. Tridymite is chemically identical to quartz, but has a different crystal structure. Sometimes contains sodium aluminum silicate, which seems to be expelled when quartz solidifies at lower temperatures.
- The Nuttall Encyclopedia
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The correct Spelling of this word is: Tridymite
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