'Tridymite' definitions:

Definition of 'tridymite'

noun

A mineral form of silica

Definition of 'Tridymite'

From: GCIDE

Tridymite \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. [1913 Webster]

A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z