A grey or greenish-blue mineral consisting of aluminum silicate in crystalline form; occurs in metaphoric rock, used as a refractory [syn: kyanite, cyanite]
Cyanite \Cy"a*nite\ (-n?t), n. [See Cyanic.] (Min.)
A mineral occuring in thin-bladed crystals and crystalline
aggregates, of a sky-blue color. It is a silicate of
aluminium. [Written also kyanite.]
[1913 Webster] cyanobacterium
