dalton

5 definitions found

dalton - Collaborative International Dictionary of English v.0.48 :

  Microcrith \Mi`cro*crith"\, n. [Micro- + crith.] (Chem.)
     The weight of the half hydrogen molecule, or of the hydrogen
     atom, at one time taken as the standard in comparing the
     atomic weights of the elements; thus, an atom of oxygen
     weighs sixteen microcriths. This unit is no longer used, and
     has been replaced by the Dalton, which is of approximately
     the same value. See molecular weight and Crith. --J. P.
     Cooke.
     [1913 Webster +PJC]

  Dalton \Dalton\ n.
     John Dalton, scientist, born 1766, died 1844.
  
     Syn: John Dalton.
          [WordNet 1.5]

  dalton \dalton\ n. [from the chemist John Dalton, proponent of
     the modern atomic theory of matter.]
     a unit of mass, approximately 1.66 x 10^-24 grams; -- it is
     approximately equal to the mass of one hydrogen atom, but the
     exact value differs slightly as used in physics and
     chemistry. It is used mostly to describe the size of proteins
     and nucleic acids in biochemistry.
  
     Note: Molecular weights are often expressed as dimensionless
           units, the unit being understood (in chemistry) to be
           the atomic mass unit with carbon equal to 14. Thus
           having a "molecular weight of 255" means the same as
           each molecule having a mass of 255 daltons.
  
     Syn: Syn. atomic mass unit.
          [PJC]

dalton - WordNet (r) 2.1 (2005) :

  Dalton
      n 1: English chemist and physicist who formulated atomic theory
           and the law of partial pressures; gave the first
           description of red-green color blindness (1766-1844) [syn:
           Dalton, John Dalton]

dalton - U.S. Gazetteer (1990) :

  Dalton, GA (city, FIPS 21380)
    Location: 34.76901 N, 84.97591 W
    Population (1990): 21761 (9555 housing units)
    Area: 46.6 sq km (land), 0.0 sq km (water)
    Zip code(s): 30720, 30721
  Dalton, MA
    Zip code(s): 01226
  Dalton, MN (city, FIPS 14626)
    Location: 46.17344 N, 95.91633 W
    Population (1990): 234 (124 housing units)
    Area: 0.6 sq km (land), 0.0 sq km (water)
    Zip code(s): 56324
  Dalton, MO (town, FIPS 18118)
    Location: 39.39815 N, 92.99200 W
    Population (1990): 38 (39 housing units)
    Area: 0.5 sq km (land), 0.0 sq km (water)
    Zip code(s): 65246
  Dalton, NE (village, FIPS 12070)
    Location: 41.40767 N, 102.97036 W
    Population (1990): 282 (151 housing units)
    Area: 0.9 sq km (land), 0.0 sq km (water)
    Zip code(s): 69131
  Dalton, NY
    Zip code(s): 14836
  Dalton, OH (village, FIPS 19974)
    Location: 40.79924 N, 81.69718 W
    Population (1990): 1377 (538 housing units)
    Area: 2.6 sq km (land), 0.0 sq km (water)
    Zip code(s): 44618
  Dalton, PA (borough, FIPS 18088)
    Location: 41.53786 N, 75.73863 W
    Population (1990): 1369 (497 housing units)
    Area: 8.0 sq km (land), 0.2 sq km (water)
    Zip code(s): 18414
  Dalton, WI
    Zip code(s): 53926