aphanite

noun

aph·​a·​nite

ˈafəˌnīt,

usually -t + V

plural -s

: a dark rock of such close texture that its separate grains are invisible to the naked eye

aphanitic

¦afə¦nitik

adjective

aphanitism

ˈafəˌnītˌizəm;

əˈfanəˌtiz-

aˈ-

noun

plural -s

Word History

Etymology

French, from aphan- + -ite

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