Source : Webster's Revised Unabridged Dictionary (1913)

Oxlip \Ox"lip`\, n. [AS. oxanslyppe. See {Ox}, and {Cowslip}.]
   (Bot.)
   The great cowslip ({Primula veris}, var. {elatior}).

Source : WordNet®

oxlip
     n : Eurasian primrose with yellow flowers clustered in a
         one-sided umbel [syn: {paigle}, {Primula elatior}]