'Butterwort' definitions:

Definition of 'butterwort'

(from WordNet)
noun
Any of numerous carnivorous bog plants of the genus Pinguicula having showy purple or yellow or white flowers and a rosette of basal leaves coated with a sticky secretion to trap small insects

Definition of 'Butterwort'

From: GCIDE
  • Butterwort \But"ter*wort`\, n. (Bot.) A genus of low herbs (Pinguicula) having simple leaves which secrete from their glandular upper surface a viscid fluid, to which insects adhere, after which the margin infolds and the insects are digested by the plant. The species are found mostly in the North Temperate zone. [1913 Webster]