Source : Webster's Revised Unabridged Dictionary (1913)

Crossness \Cross"ness\, n.
   The quality or state of being cross; peevishness;
   fretfulness; ill humor.

Source : WordNet®

crossness
     n 1: an irritable petulant feeling [syn: {irritability}, {fretfulness},
           {fussiness}, {peevishness}, {petulance}, {choler}]
     2: a disposition to be ill tempered [syn: {crabbiness}, {crabbedness}]