The Collaborative International Dictionary of English v.0.48:

Suspiration \Sus`pi*ra"tion\, n. [L. suspiratio. See Suspire.]
   The act of sighing, or fetching a long and deep breath; a
   deep respiration; a sigh.
   [1913 Webster]

         Windy suspiration of forced breath.      --Shak.
   [1913 Webster]

WordNet (r) 3.0 (2006):

suspiration
    n 1: an utterance made by exhaling audibly [syn: sigh,
         suspiration]