'Pecan' definitions:

Definition of 'pecan'

From: WordNet
noun
Wood of a pecan tree
noun
Tree of southern United States and Mexico cultivated for its nuts [syn: pecan, pecan tree, Carya illinoensis, Carya illinoinsis]
noun
Smooth brown oval nut of south central United States

Definition of 'Pecan'

From: GCIDE
  • Pecan \Pe*can"\ (p[-e]*k[a^]n"), n. [Cf. F. pacane the nut.] (Bot.) A species of hickory (Carya oliv[ae]formis), growing in North America, chiefly in the Mississippi valley and in Texas, where it is one of the largest of forest trees; also, its fruit, a smooth, oblong nut, an inch or an inch and a half long, with a thin shell and well-flavored meat. [Written also pacane.] [1913 Webster]