WordReference Random House Unabridged Dictionary of American English © 2020
buttercup fam′ily, 
  • Plant Biologythe plant family Ranunculaceae, typified by mostly herbaceous plants having usually alternate leaves, multistaminate flowers sometimes lacking petals but with colorful sepals, and including the anemone, buttercup, clematis, columbine, delphinium, and monkshood.

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