| 释义 |
tridymite Min.|ˈtrɪdɪmaɪt|
[ad. Ger. tridymit (vom Rath 1866), f. Gr. τρίδυµος threefold, f. τρι- tri- + -δυµ-ος, as in δίδυµος twin; named in allusion to its compound forms consisting of three individual crystals.]
A crystallized form of silica, occurring in small hexagonal tables, found in trachyte and other igneous rocks.
1868Dana Min. (ed. 5) 805 Tridymite occurs in small hexagonal tables, colorless and transparent, which are usually compound, and mostly of three individuals. 1888Rutley Rock-Forming Min. 130 Tridymite is essentially a volcanic mineral. |