(definition) by Webster 1913 Wed Dec 22 1999 at 0:21:32

In*cer"tum (?), a.

Doubtful; not of definite form.

Opus incertum Anc. Arch., a kind of masonry employed in building walls, in which the stones were not squared nor laid in courses; rubblework.

 

© Webster 1913.

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