adjective Crystallography.
without crystal faces.

1930–35; un-1 + faced

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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The choice between faced versus unfaced is usually a matter of personal preference.
Polyethylene sheets meet this requirement and can be used with unfaced batts.
The insulation shall be of unfaced insulation batts in the walls and ceiling.
Because the insulation will be exposed, be sure to use either an unfaced product or one with the appropriate flame spread rating.
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