The Collaborative International Dictionary of English v.0.48:

Insufflation \In`suf*fla"tion\, n. [L. insuffatio: cf. F.
   insuffation. See In- in, and Sufflation.]
   The act of breathing on or into anything; especially:
   (a) (R. C. Ch.) The breathing upon a person in the sacrament
       of baptism to symbolize the inspiration of a new
       spiritual life.
   (b) (Med.) The act of blowing (a gas, powder, or vapor) into
       any cavity of the body.
       [1913 Webster]

WordNet (r) 3.0 (2006):

insufflation
    n 1: (medicine) blowing air or medicated powder into the lungs
         (or into some other body cavity)
    2: an act of blowing or breathing on or into something