The Collaborative International Dictionary of English v.0.48:

Gambier \Gam"bier\, n. [Malayan.]
   (a) The inspissated juice of a plant (Uncaria Gambir)
       growing in Malacca. It is a powerful astringent, and,
       under the name of Terra Japonica, is used for chewing
       with the Areca nut, and is exported for tanning and
       dyeing.
   (b) Catechu. [Written also gambeer and gambir.]
       [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Catechu \Cat"e*chu\, n. [See Cashoo.] (Chem.)
   A dry, brown, astringent extract, obtained by decoction and
   evaporation from the Acacia catechu, and several other
   plants growing in India. It contains a large portion of
   tannin or tannic acid, and is used in medicine and in the
   arts. It is also known by the names terra japonica,
   cutch, gambier, etc. --Ure. --Dunglison.
   [1913 Webster]

U.S. Gazetteer Places (2000):

Gambier, OH -- U.S. village in Ohio
   Population (2000):    1871
   Housing Units (2000): 305
   Land area (2000):     0.936194 sq. miles (2.424731 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    0.936194 sq. miles (2.424731 sq. km)
   FIPS code:            29246
   Located within:       Ohio (OH), FIPS 39
   Location:             40.376400 N, 82.396570 W
   ZIP Codes (1990):     43022
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Gambier, OH
    Gambier