Source : Webster's Revised Unabridged Dictionary (1913)

Negotiant \Ne*go"ti*ant\, n. [L. negotians, prop. p. pr. of
   negotiari: cf. F. n['e]gociant.]
   A negotiator. [R.] --Sir W. Raleigh.

Source : WordNet®

negotiant
     n : someone who negotiates (confers with others in order to
         reach a settlement) [syn: {negotiator}, {treater}]