but·ter·wort /-ˌwɝt, ˌwɔrt/
 捕蟲瑾
 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.
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 butterwort
      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