buttercup

noun

• a herbaceous plant with bright yellow cup-shaped flowers, common in grassland and as a garden weed. All kinds are poisonous and generally avoided by livestock.

  • Genus Ranunculus, family Ranunculaceae (the buttercup family): numerous species, including the very familiar common buttercup (R. acris). This large family also includes anemones, celandines, aconites, clematises, and hellebores, many of which have poisonous seeds