The Collaborative International Dictionary of English v.0.48:

Castanea \Cas*ta"ne*a\, n. [L., a chestnut, fr. Gr. ?.] (Bot.)
   A genus of nut-bearing trees or shrubs including the chestnut
   and chinquapin.
   [1913 Webster]

WordNet (r) 3.0 (2006):

Castanea
    n 1: chestnuts; chinkapins [syn: Castanea, genus Castanea]

U.S. Gazetteer Places (2000):

Castanea, PA -- U.S. Census Designated Place in Pennsylvania
   Population (2000):    1189
   Housing Units (2000): 512
   Land area (2000):     1.339907 sq. miles (3.470343 sq. km)
   Water area (2000):    0.032074 sq. miles (0.083070 sq. km)
   Total area (2000):    1.371981 sq. miles (3.553413 sq. km)
   FIPS code:            11648
   Located within:       Pennsylvania (PA), FIPS 42
   Location:             41.122882 N, 77.432578 W
   ZIP Codes (1990):
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Castanea, PA
    Castanea