The Collaborative International Dictionary of English v.0.48:

Pinon \Pi[~n]"on\, n. [Sp. pi[~n]on.] (Bot.)
      (a) The edible seed of several species of pine; also, the
          tree producing such seeds, as Pinus Pinea of
          Southern Europe, and Pinus Parryana, cembroides,
          edulis, and monophylla, the nut pines of Western
          North America.
      (b) See Monkey's puzzle. [Written also pignon.]
          [1913 Webster]

WordNet (r) 3.0 (2006):

pinon
    n 1: any of several low-growing pines of western North America
         [syn: pinon, pinyon]

Hitchcock's Bible Names Dictionary (late 1800's):

Pinon, pearl; gem; that beholds


U.S. Gazetteer Places (2000):

Pinon, AZ -- U.S. Census Designated Place in Arizona
   Population (2000):    1190
   Housing Units (2000): 372
   Land area (2000):     6.435539 sq. miles (16.667969 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    6.435539 sq. miles (16.667969 sq. km)
   FIPS code:            56120
   Located within:       Arizona (AZ), FIPS 04
   Location:             36.100862 N, 110.219387 W
   ZIP Codes (1990):     86510
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Pinon, AZ
    Pinon