'Lactuca' definitions:

Definition of 'Lactuca'

(from WordNet)
noun
An herb with milky juice: lettuce; prickly lettuce [syn: Lactuca, genus Lactuca]

Definition of 'Lactuca'

From: GCIDE
  • Lactuca \Lac*tu"ca\, n. [L., lettuce. See Lettuce.] (Bot.) A genus of composite herbs, several of which are cultivated for salad; lettuce. [1913 Webster]