urobilin
         n 1: brown bile pigment formed from urobilinogens and found in
               feces and in small amounts in urine

English Dictionary: urobilinogen	by the DICT Development Group
From WordNet (r) 3.0 (2006) [wn]:
urobilinogen n a chromogen formed in the intestine from the breakdown of bilirubin; yields urobilins on oxidation; some is excreted in the feces and some is resorbed and excreted in bile or urine Synonym(s): urobilinogen, stercobilinogen
From Webster's Revised Unabridged Dictionary (1913) [web1913]:
Bear \Bear\, n. [OE. bere, AS. bera; akin to D. beer, OHG. bero,       pero, G. b[84]r, Icel. & Sw. bj[94]rn, and possibly to L.       fera wild beast, Gr. [?] beast, Skr. bhalla bear.]       1. (Zo[94]l.) Any species of the genus Ursus, and of the             closely allied genera. Bears are plantigrade Carnivora,             but they live largely on fruit and insects.          Note: The European brown bear ({U. arctos}), the white polar                bear ({U. maritimus}), the grizzly bear ({U.                horribilis}), the American black bear, and its variety                the cinnamon bear ({U. Americanus}), the Syrian bear                ({Ursus Syriacus}), and the sloth bear, are among the                notable species.          2. (Zo[94]l.) An animal which has some resemblance to a bear             in form or habits, but no real affinity; as, the woolly             bear; ant bear; water bear; sea bear.          3. (Astron.) One of two constellations in the northern             hemisphere, called respectively the {Great Bear} and the             {Lesser Bear}, or {Ursa Major} and {Ursa Minor}.          4. Metaphorically: A brutal, coarse, or morose person.          5. (Stock Exchange) A person who sells stocks or securities             for future delivery in expectation of a fall in the             market.          Note: The bears and bulls of the Stock Exchange, whose                interest it is, the one to depress, and the other to                raise, stocks, are said to be so called in allusion to                the bear's habit of pulling down, and the bull's of                tossing up.          6. (Mach.) A portable punching machine.          7. (Naut.) A block covered with coarse matting; -- used to             scour the deck.          {Australian bear}. (Zo[94]l.) See {Koala}.          {Bear baiting}, the sport of baiting bears with dogs.          {Bear caterpillar} (Zo[94]l.), the hairy larva of a moth,             esp. of the genus {Euprepia}.          {Bear garden}.             (a) A place where bears are kept for diversion or                   fighting.             (b) Any place where riotous conduct is common or                   permitted. --M. Arnold.          {Bear leader}, one who leads about a performing bear for             money; hence, a facetious term for one who takes charge of             a young man on his travels.
From Webster's Revised Unabridged Dictionary (1913) [web1913]:
Urobilin \U`ro*bi"lin\, n. [1st uro- + bile + -in.] (Physiol.       Chem.)       A yellow pigment identical with hydrobilirubin, abundant in       the highly colored urine of fever, and also present in normal       urine. See {Urochrome}.