Lewis & Short

runcātĭo, ōnis,f. [runco].

  1. I. A weeding, weeding out, Col. 2, 9, 18; 2, 11, 19; Plin. 18, 21, 50, § 185.
  2. II. Concr., weeds to be pulled out, Col. 2, 11, 6.