The Collaborative International Dictionary of English v.0.48:

Vermilion \Ver*mil"ion\, v. t.
   To color with vermilion, or as if with vermilion; to dye red;
   to cover with a delicate red.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Vermilion \Ver*mil"ion\, n. [F. vermillon. See Vermeil.]
   1. (Chem.) A bright red pigment consisting of mercuric
      sulphide, obtained either from the mineral cinnabar or
      artificially. It has a fine red color, and is much used in
      coloring sealing wax, in printing, etc.
      [1913 Webster]

   Note: The kermes insect has long been used for dyeing red or
         scarlet. It was formerly known as the worm dye,
         vermiculus, or vermiculum, and the cloth was called
         vermiculatia. Hence came the French vermeil for any red
         dye, and hence the modern name vermilion, although the
         substance it denotes is very different from the kermes,
         being a compound of mercury and sulphur. --R. Hunt.
         [1913 Webster]

   2. Hence, a red color like the pigment; a lively and
      brilliant red; as, cheeks of vermilion.
      [1913 Webster]

WordNet (r) 3.0 (2006):

vermilion
    adj 1: of a vivid red to reddish-orange color [syn: vermilion,
           vermillion, cinnabar, Chinese-red]
    n 1: a variable color that is vivid red but sometimes with an
         orange tinge [syn: scarlet, vermilion, orange red]
    v 1: color vermilion

Moby Thesaurus II by Grady Ward, 1.0:

74 Moby Thesaurus words for "vermilion":
   Titian, Titian-red, bricky, cardinal, carmine, carnation,
   carnelian, cerise, cherry, cherry-colored, cherry-red, crimson,
   damask, ferruginous, fiery, fire-red, flame-colored, flame-red,
   flaming, glowing, gules, henna, hot, incarmined, incarnadine,
   inflame, inflamed, infrared, iron-red, lake-colored, laky,
   lateritious, lipstick, lobster-red, lurid, madder, maroon, miniate,
   port-wine, puce, red, red-dyed, red-ink, red-looking, redden,
   reddened, reddish, reddish-amber, reddish-brown, rouge, rubicund,
   rubify, rubiginous, rubric, rubricose, ruby, ruby-colored,
   ruby-red, ruddied, ruddle, ruddy, rufescent, rufous, rust,
   rust-red, rusty, scarlet, stammel, tile-red, vinaceous, warm, wine,
   wine-colored, wine-red



U.S. Gazetteer Counties (2000):

Vermilion -- U.S. County in Illinois
   Population (2000):    83919
   Housing Units (2000): 36349
   Land area (2000):     899.080050 sq. miles (2328.606541 sq. km)
   Water area (2000):    3.056357 sq. miles (7.915927 sq. km)
   Total area (2000):    902.136407 sq. miles (2336.522468 sq. km)
   Located within:       Illinois (IL), FIPS 17
   Location:             40.156797 N, 87.692434 W
   Headwords:
    Vermilion
    Vermilion, IL
    Vermilion County
    Vermilion County, IL


U.S. Gazetteer Counties (2000):

Vermilion -- U.S. Parish in Louisiana
   Population (2000):    53807
   Housing Units (2000): 22461
   Land area (2000):     1173.781395 sq. miles (3040.079728 sq. km)
   Water area (2000):    364.532580 sq. miles (944.135007 sq. km)
   Total area (2000):    1538.313975 sq. miles (3984.214735 sq. km)
   Located within:       Louisiana (LA), FIPS 22
   Location:             29.961979 N, 92.221910 W
   Headwords:
    Vermilion
    Vermilion, LA
    Vermilion Parish
    Vermilion Parish, LA


U.S. Gazetteer Places (2000):

Vermilion, OH -- U.S. city in Ohio
   Population (2000):    10927
   Housing Units (2000): 4713
   Land area (2000):     10.791184 sq. miles (27.949038 sq. km)
   Water area (2000):    0.051579 sq. miles (0.133589 sq. km)
   Total area (2000):    10.842763 sq. miles (28.082627 sq. km)
   FIPS code:            79716
   Located within:       Ohio (OH), FIPS 39
   Location:             41.417656 N, 82.344351 W
   ZIP Codes (1990):     44089
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Vermilion, OH
    Vermilion


U.S. Gazetteer Places (2000):

Vermilion, IL -- U.S. village in Illinois
   Population (2000):    239
   Housing Units (2000): 105
   Land area (2000):     0.762124 sq. miles (1.973891 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    0.762124 sq. miles (1.973891 sq. km)
   FIPS code:            77551
   Located within:       Illinois (IL), FIPS 17
   Location:             39.580343 N, 87.588492 W
   ZIP Codes (1990):
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Vermilion, IL
    Vermilion