The Collaborative International Dictionary
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.
Wiktionary
n. Any plant of the insectivorous genus ''Pinguicula''.
WordNet
n. 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
Usage examples of "butterwort".
Up here there was loveliness enough, from the stars of butterwort and grass of Parnassus by the wellheads to the solemn tops of Sgurr Dearg, the colour of stormy waves against a faint turquoise sky.
Butterwort and red-and-blue never-say-die clambered up the gullies toward the hillcrests, and white mooneyes covered the ground almost everywhere that grass did not.
White and gold rocks, rimmed round with purple butterwort, Indian paintbrush and feathery yellow stonecrop, created magnificent tumbles of color in the desolate landscape.