The Collaborative International Dictionary of English v.0.48:

Blackwood \Black"wood\ (bl[a^]k"w[oo^]d), n.
   A name given to several dark-colored timbers. The East Indian
   black wood is from the tree Dalbergia latifolia. --Balfour.
   [1913 Webster]

WordNet (r) 3.0 (2006):

blackwood
    n 1: very dark wood of any of several blackwood trees
    2: any of several hardwood trees yielding very dark-colored wood
       [syn: blackwood, blackwood tree]

U.S. Gazetteer Places (2000):

Blackwood, NJ -- U.S. Census Designated Place in New Jersey
   Population (2000):    4692
   Housing Units (2000): 1840
   Land area (2000):     1.240579 sq. miles (3.213084 sq. km)
   Water area (2000):    0.011688 sq. miles (0.030271 sq. km)
   Total area (2000):    1.252267 sq. miles (3.243355 sq. km)
   FIPS code:            06040
   Located within:       New Jersey (NJ), FIPS 34
   Location:             39.795981 N, 75.062304 W
   ZIP Codes (1990):
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Blackwood, NJ
    Blackwood