The Collaborative International Dictionary of English v.0.48:

Cent \Cent\, n. [F. cent hundred, L. centum. See Hundred.]
   1. A hundred; as, ten per cent, the proportion of ten parts
      in a hundred.
      [1913 Webster]

   2. A United States coin, the hundredth part of a dollar,
      formerly made of copper, now of copper, tin, and zinc.
      [1913 Webster]

   3. An old game at cards, supposed to be like piquet; -- so
      called because 100 points won the game. --Nares.
      [1913 Webster]

WordNet (r) 3.0 (2006):

cent
    n 1: a fractional monetary unit of several countries
    2: a coin worth one-hundredth of the value of the basic unit
       [syn: penny, cent, centime]

Moby Thesaurus II by Grady Ward, 1.0:

140 Moby Thesaurus words for "cent":
   C, C-note, Deutschmark, G, G-note, Mark, Reichsmark, a continental,
   a curse, a damn, a darn, a hoot, afghani, anna, bagatelle, baht,
   bauble, bean, bibelot, bit, brass farthing, buck, button,
   cartwheel, centavo, centime, century, conto, copper, curio, dime,
   dollar, dollar bill, dong, farce, farthing, feather, fifty cents,
   fig, fin, fish, five cents, five hundred dollars, five-dollar bill,
   five-hundred-dollar bill, five-spot, fiver, fleabite, florin,
   folderol, four bits, franc, fribble, frippery, frogskin, gaud,
   gewgaw, gimcrack, grand, guilder, gulden, hair, half G, half a C,
   half dollar, half grand, halfpenny, hill of beans,
   hundred-dollar bill, iron man, jest, joke, kickshaw, kip,
   knickknack, knickknackery, kopeck, krona, krone, lira, mill,
   milreis, minikin, mockery, molehill, nickel, penny, peppercorn,
   peseta, picayune, pie, piece of eight, pin, pinch of snuff,
   pinprick, pistareen, pound, quarter, rand, rap, red cent, rial,
   row of pins, ruble, rupee, rush, sawbuck, shekel, shilling, shit,
   silver dollar, skin, smacker, snap, sneeshing, sol, sou, stiver,
   straw, ten cents, ten-spot, tenner, thousand dollars,
   thousand-dollar bill, toy, trifle, trinket, triviality, tuppence,
   twenty-dollar bill, twenty-five cents, two bits, two cents,
   two-dollar bill, two-spot, twopence, whim-wham, won, yard, yen



Bouvier's Law Dictionary, Revised 6th Ed (1856):

CENT, money. A copper coin of the United States of the value of ten mills;
ten of them are equal to a dime, and one hundred, to one dollar. Each cent
is required to contain one hundred and sixty-eight grains. Act of January
18th, 1837, 4 Sharsw. cont. of Story',s L. U. S. 2524.