The Collaborative International Dictionary of English v.0.48:

Collin \Col"lin\, n. [Gr. ko`lla glue.]
   A very pure form of gelatin.
   [1913 Webster]

U.S. Gazetteer Counties (2000):

Collin -- U.S. County in Texas
   Population (2000):    491675
   Housing Units (2000): 194892
   Land area (2000):     847.557094 sq. miles (2195.162704 sq. km)
   Water area (2000):    38.289415 sq. miles (99.169125 sq. km)
   Total area (2000):    885.846509 sq. miles (2294.331829 sq. km)
   Located within:       Texas (TX), FIPS 48
   Location:             33.129610 N, 96.646461 W
   Headwords:
    Collin
    Collin, TX
    Collin County
    Collin County, TX