The Collaborative International Dictionary of English v.0.48:

Dewar \Dew"ar\ (d[=u]"[~e]r), Dewar vessel \Dew"ar ves`sel\,
Dewar flask \Dew"ar flask\ [After Sir James Dewar, British
   physicist.]
   A double-walled glass vessel for holding liquid air, liquid
   nitrogen, etc., having the space between the walls exhausted
   so as to prevent conduction of heat, and sometimes having the
   glass silvered to prevent absorption of radiant heat; --
   called also, according to the particular shape,

   Dewar bulb,

   Dewar tube, etc.
      [Webster 1913 Suppl. +PJC]

WordNet (r) 3.0 (2006):

Dewar
    n 1: vacuum flask that holds liquid air or helium for scientific
         experiments [syn: Dewar flask, Dewar]
    2: Scottish chemist and physicist noted for his work in
       cryogenics and his invention of the Dewar flask (1842-1923)
       [syn: Dewar, Sir James Dewar]

U.S. Gazetteer Places (2000):

Dewar, OK -- U.S. town in Oklahoma
   Population (2000):    919
   Housing Units (2000): 386
   Land area (2000):     0.919732 sq. miles (2.382095 sq. km)
   Water area (2000):    0.007227 sq. miles (0.018719 sq. km)
   Total area (2000):    0.926959 sq. miles (2.400814 sq. km)
   FIPS code:            20500
   Located within:       Oklahoma (OK), FIPS 40
   Location:             35.458946 N, 95.945973 W
   ZIP Codes (1990):
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Dewar, OK
    Dewar