Lewis & Short

cŏlubrīnus, a, um, adj. [coluber],

  1. I. like a serpent; trop., cunning, wily (ante- and post-class.): ingenio esse, Plaut. Truc. 4, 3, 6: vis gestūs, Tert. Spect. 18.
  2. II. Subst.: cŏlubrīna, ae, f., a plant, also called bryonia and dracontea, App. Herb. 14.