The Collaborative International Dictionary of English v.0.48:

Redwood \Red"wood`\ (-w[oo^]d`), n. (Bot.)
   (a) A gigantic coniferous tree (Sequoia sempervirens) of
       California, and its light and durable reddish timber. See
       Sequoia.
   (b) An East Indian dyewood, obtained from Pterocarpus
       santalinus, Caesalpinia Sappan, and several other
       trees.
       [1913 Webster]

   Note: The redwood of Andaman is Pterocarpus dalbergioides;
         that of some parts of tropical America, several species
         of Erythoxylum; that of Brazil, the species of
         Humirium.
         [1913 Webster]

WordNet (r) 3.0 (2006):

redwood
    n 1: the soft reddish wood of either of two species of sequoia
         trees
    2: either of two huge coniferous California trees that reach a
       height of 300 feet; sometimes placed in the Taxodiaceae [syn:
       sequoia, redwood]

U.S. Gazetteer Counties (2000):

Redwood -- U.S. County in Minnesota
   Population (2000):    16815
   Housing Units (2000): 7230
   Land area (2000):     879.726014 sq. miles (2278.479819 sq. km)
   Water area (2000):    1.512176 sq. miles (3.916517 sq. km)
   Total area (2000):    881.238190 sq. miles (2282.396336 sq. km)
   Located within:       Minnesota (MN), FIPS 27
   Location:             44.411100 N, 95.237056 W
   Headwords:
    Redwood
    Redwood, MN
    Redwood County
    Redwood County, MN


U.S. Gazetteer Places (2000):

Redwood, NY -- U.S. Census Designated Place in New York
   Population (2000):    584
   Housing Units (2000): 277
   Land area (2000):     2.035972 sq. miles (5.273143 sq. km)
   Water area (2000):    0.514751 sq. miles (1.333200 sq. km)
   Total area (2000):    2.550723 sq. miles (6.606343 sq. km)
   FIPS code:            61016
   Located within:       New York (NY), FIPS 36
   Location:             44.300703 N, 75.800489 W
   ZIP Codes (1990):     13679
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Redwood, NY
    Redwood


U.S. Gazetteer Places (2000):

Redwood, OR -- U.S. Census Designated Place in Oregon
   Population (2000):    5844
   Housing Units (2000): 2529
   Land area (2000):     4.840382 sq. miles (12.536531 sq. km)
   Water area (2000):    0.063713 sq. miles (0.165017 sq. km)
   Total area (2000):    4.904095 sq. miles (12.701548 sq. km)
   FIPS code:            61250
   Located within:       Oregon (OR), FIPS 41
   Location:             42.420256 N, 123.381486 W
   ZIP Codes (1990):
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Redwood, OR
    Redwood


U.S. Gazetteer Places (2000):

Redwood, TX -- U.S. Census Designated Place in Texas
   Population (2000):    3586
   Housing Units (2000): 946
   Land area (2000):     5.872597 sq. miles (15.209955 sq. km)
   Water area (2000):    0.068575 sq. miles (0.177609 sq. km)
   Total area (2000):    5.941172 sq. miles (15.387564 sq. km)
   FIPS code:            61352
   Located within:       Texas (TX), FIPS 48
   Location:             29.814750 N, 97.913375 W
   ZIP Codes (1990):
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Redwood, TX
    Redwood