'Opus incertum' definitions:

Definition of 'Opus incertum'

From: GCIDE
  • Incertum \In*cer"tum\, a. Doubtful; not of definite form. [1913 Webster]
  • Opus incertum (Anc. Arch.), a kind of masonry employed in building walls, in which the stones were not squared nor laid in courses; rubblework. [1913 Webster]