Source : Webster's Revised Unabridged Dictionary (1913)

Sternutation \Ster`nu*ta"tion\, n. [L. sternutatio, fr.
   sternutare to sneeze, intens. from sternuere.]
   The act of sneezing. --Quincy.

Source : WordNet®

sternutation
     n : a symptom consisting of the involuntary expulsion of air
         from the nose [syn: {sneeze}, {sneezing}]