sternutatory

from WordNet (r) 3.0 (2006)

sternutatory
    adj 1: tending to cause sneezing
    2: causing sneezing; "pepper is a sternutatory substance" [syn:
       {sternutatory}, {sternutative}]
    n 1: a chemical substance that causes sneezing and coughing and
         crying; "police used a sternutatory to subdue the mob"
         [syn: {sternutator}, {sternutatory}]

from The Collaborative International Dictionary of English v.0.48

Sternutatory \Ster*nu"ta*to*ry\, a.
   Sternutative. -- n. A sternutatory substance or medicine.
   [1913 Webster]