ruderatio

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.

rūdĕrātĭo, ōnis, f. [rudero],

I a paving with rubbish , ruderation , Vitr. 7, 1.—

II Transf., a mass of broken stone , Vitr. 5, 12, 6.