buttercup
countable noun: A buttercup is a small plant with bright yellow flowers.
buttercup in American English
any of a genus (Ranunculus) of normally yellow-flowered plants of the buttercup family, common in meadows and wet places
designating a large, widespread family (Ranunculaceae, order Ranunculales) of dicotyledonous flowering plants, including peonies, aconites, and anemones
noun: any of numerous plants of the genus Ranunculus, having glossy yellow flowers and deeply cut leaves