The Collaborative International Dictionary of English v.0.48:

Morsel \Mor"sel\, n. [OF. morsel, F. morceau, LL. morsellus, a
   dim. fr. L. morsus a biting, bite, fr. mordere to bite; prob.
   akin to E. smart. See Smart, and cf. Morceau, Mordant,
   Muse, v., Muzzle, n.]
   1. A little bite or bit of food. --Chaucer.
      [1913 Webster]

            Every morsel to a satisfied hunger is only a new
            labor to a tired digestion.           --South.
      [1913 Webster]

   2. A small quantity; a little piece; a fragment.
      [1913 Webster]

WordNet (r) 3.0 (2006):

morsel
    n 1: a small quantity of anything; "a morsel of paper was all he
         needed"
    2: a small amount of solid food; a mouthful; "all they had left
       was a bit of bread" [syn: morsel, bit, bite]