The 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   has been replaced by the Dalton, which is of approximately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]

The Collaborative International Dictionary of English v.0.48:

Dalton \Dalton\ n.
   John Dalton, scientist, born 1766, died 1844.

   Syn: John Dalton.
        [WordNet 1.5]

The Collaborative International Dictionary of English v.0.48:

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]

WordNet (r) 3.0 (2006):

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]

U.S. Gazetteer Places (2000):

Dalton, NE -- U.S. village in Nebraska
   Population (2000):    332
   Housing Units (2000): 170
   Land area (2000):     0.343611 sq. miles (0.889948 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    0.343611 sq. miles (0.889948 sq. km)
   FIPS code:            12070
   Located within:       Nebraska (NE), FIPS 31
   Location:             41.408685 N, 102.972195 W
   ZIP Codes (1990):     69131
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Dalton, NE
    Dalton


U.S. Gazetteer Places (2000):

Dalton, GA -- U.S. city in Georgia
   Population (2000):    27912
   Housing Units (2000): 10229
   Land area (2000):     19.824620 sq. miles (51.345527 sq. km)
   Water area (2000):    0.015111 sq. miles (0.039138 sq. km)
   Total area (2000):    19.839731 sq. miles (51.384665 sq. km)
   FIPS code:            21380
   Located within:       Georgia (GA), FIPS 13
   Location:             34.771088 N, 84.971553 W
   ZIP Codes (1990):     30720 30721
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Dalton, GA
    Dalton


U.S. Gazetteer Places (2000):

Dalton, OH -- U.S. village in Ohio
   Population (2000):    1605
   Housing Units (2000): 628
   Land area (2000):     1.221573 sq. miles (3.163859 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    1.221573 sq. miles (3.163859 sq. km)
   FIPS code:            19974
   Located within:       Ohio (OH), FIPS 39
   Location:             40.799295 N, 81.697030 W
   ZIP Codes (1990):     44618
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Dalton, OH
    Dalton


U.S. Gazetteer Places (2000):

Dalton, PA -- U.S. borough in Pennsylvania
   Population (2000):    1294
   Housing Units (2000): 519
   Land area (2000):     3.100343 sq. miles (8.029850 sq. km)
   Water area (2000):    0.061813 sq. miles (0.160096 sq. km)
   Total area (2000):    3.162156 sq. miles (8.189946 sq. km)
   FIPS code:            18088
   Located within:       Pennsylvania (PA), FIPS 42
   Location:             41.535597 N, 75.735090 W
   ZIP Codes (1990):     18414
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Dalton, PA
    Dalton


U.S. Gazetteer Places (2000):

Dalton, MN -- U.S. city in Minnesota
   Population (2000):    258
   Housing Units (2000): 119
   Land area (2000):     0.239488 sq. miles (0.620272 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    0.239488 sq. miles (0.620272 sq. km)
   FIPS code:            14626
   Located within:       Minnesota (MN), FIPS 27
   Location:             46.173403 N, 95.916658 W
   ZIP Codes (1990):     56324
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Dalton, MN
    Dalton


U.S. Gazetteer Places (2000):

Dalton, MO -- U.S. town in Missouri
   Population (2000):    27
   Housing Units (2000): 24
   Land area (2000):     0.177026 sq. miles (0.458495 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    0.177026 sq. miles (0.458495 sq. km)
   FIPS code:            18118
   Located within:       Missouri (MO), FIPS 29
   Location:             39.397130 N, 92.991248 W
   ZIP Codes (1990):     65246
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Dalton, MO
    Dalton