The Collaborative International Dictionary of English v.0.48:

Mucronate \Mu"cro*nate\, Mucronated \Mu"cro*na`ted\, a. [L.
   mucronatus, fr. mucro a sharp point: cf. F. mucron['e].]
   Ending abruptly in a sharp point; abruptly tipped with a
   short and sharp point; as, a mucronate leaf. --
   Mu"cro*nate*ly, adv.
   [1913 Webster]