aphanite

aph·a·nite

 (ăf′ə-nīt′)

n.

A dense, homogeneous rock with constituents so fine that they cannot be seen by the naked eye.

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[From Greek aphanēs, unseen : a-, not; see a-¹ + phainesthai, phan-, to appear, passive of phainein, to show; see phenomenon.]

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aph′a·nit′ic (-nĭt′ĭk) adj.

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

aphanite

(ˈæfəˌnaɪt)

n

(Geological Science) any fine-grained rock, such as a basalt, containing minerals that cannot be distinguished with the naked eye

[C19: from Greek aphanēs invisible]

Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

Thesaurus

Noun

1.

aphanite - fine-grained homogeneous rock (such as basalt) containing minerals undetectable by the naked eye rock, stone - material consisting of the aggregate of minerals like those making up the Earth's crust; "that mountain is solid rock"; "stone is abundant in New England and there are many quarries"

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