D defs.my
Entry 1 sense Webster, 1913

Buttercup

/bŭt'-ẽrk-ŭpˌ/ · But·ter·cup · IPA /ˈbʌt.ɚ.kʌp/
01 n. A plant of the genus Ranunculus, or crowfoot, particularly Ranunculus bulbosus, with bright yellow flowers; -- called also butterflower, go…
  1. 1.
    A plant of the genus Ranunculus, or crowfoot, particularly Ranunculus bulbosus, with bright yellow flowers; -- called also butterflower, golden cup, and kingcup. It is the cuckoobud of Shakespeare.(Bot.) Also: butterflower, golden cup, kingcup, cuckoobud