Lewis & Short

rādīcŭla, ae, f. dim. [radix].

  1. I. In gen., a small root, rootlet, Cic. Div. 2, 66, 136; Col. 5, 5, 5.
  2. II. In partic.
      1. 1. Fuller’sweed, soapwort, Plin. 19, 3, 18, § 48.
      2. 2. A small kind of radish, Col. 4, 8, 1; 11, 2, 19; Cels. 2, 18; 21; 29 al.