Source : Webster's Revised Unabridged Dictionary (1913)

Vomit \Vom"it\, v. i. [imp. & p. p. {Vomited}; p. pr. & vb. n.
   {Vomiting}.] [Cf. L. vomere, vomitum, and v. freq. vomitare.
   See {Vomit}, n.]
   To eject the contents of the stomach by the mouth; to puke;
   to spew.

Vomiting \Vom"it*ing\, n.
   The spasmodic ejection of matter from the stomach through the
   mouth.

Source : WordNet®

vomiting
     n : the reflex act of ejecting the contents of the stomach
         through the mouth [syn: {vomit}, {emesis}, {regurgitation},
          {disgorgement}, {puking}]