Illustration of oxlip
oxlip
noun
ox·lip ˈäk-ˌslip 
: a Eurasian primula (Primula elatior) having usually yellow flowers
Word History
Etymology
Middle English *oxeslippe, from Old English oxanslyppe, literally, ox dung, from oxa ox + slypa, slyppe paste — more at slip
First Known Use
before the 12th century, in the meaning defined above