Lewis & Short

ērūca, ae, f.

  1. I. A caterpillar, cankerworm, Col. 11, 3, 63, p. 464 Bip.; Pall. 1, 35 saep.; Col. 10, 333; Plin. 17, 24, 37, § 229, but here Sillig reads uruca, q. v.
  2. II. A sort of cole-wort, Brassica eruca, Linn.; Col. 11, 3, 29; 10, 109; 372; Plin. 19, 8, 44, § 154; Hor. S. 2, 8, 51; Mart. 3, 75; Vulg. Amos, 4, 9.