tridymite [trid-uh-mahyt] ExamplesWord Origin noun Mineralogy.
- a polymorph of quartz occurring in the form of small crystals, commonly twinned, in siliceous volcanic rocks.
Origin of tridymite 1865–70; German Tridymit, equivalent to tridym- (Greek trídym(os) triple, equivalent to tri-+ (dí)dymos ) + -it Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019 Examples from the Web for tridymite Contemporary Examples of tridymite
The crystals, called cristobalite and tridymite, swim in clouds around stars just before they begin to form planets.
Alexa Valiente, Jaewon Kang
October 13, 2012
Historical Examples of tridymite
Spherulites may be regarded as radiate aggregates of such microliths (mostly felspar mixed with quartz or tridymite).
When crystalline grains or blebs of quartz occur, we have a quartz-trachyte; when tridymite is abundant, as in the trachyte of Co.