respirability

from The Collaborative International Dictionary of English v.0.48

Respirability \Re*spir`a*bil"i*ty\ (r?*sp?r`?*b?l"?*t? or
   r?s`p?*r?-), n. [Cf. F. respirabilit?.]
   The quality or state of being respirable; respirableness.
   [1913 Webster]