The Collaborative International Dictionary
Respirableness
Respirable \Re*spir"a*ble\ (r?*sp?r"?*b'l or r?s"p?*r?*b'l), a. Suitable for being breathed; adapted for respiration. -- Re*spir"a*ble*ness, n.
Wiktionary
respirableness
n. The quality of being respirable.