Definitions for: Aphanite

[n] fine-grained homogeneous rock (such as basalt) containing minerals undetectable by the naked eye

Webster (1913) Definition: Aph"a*nite, n. [Gr. ? invisible; 'a priv. + ? to
appear.] (Min.)
A very compact, dark-colored ?ock, consisting of hornblende,
or pyroxene, and feldspar, but neither of them in perceptible
grains.

See Also: rock, stone