Irrespirable

Ir·res'pi·ra·ble adjective [ Latin irrespirabilis : confer French irrespirable . See Respirable .] Unfit for respiration; not having the qualities necessary to support animal life; as, irrespirable air.
Found on http://www.encyclo.co.uk/webster/I/99

irrespirable

1. Incapable of being inhaled because of irritation to the airway, resulting in breath-holding. ... 2. Denoting a gas or vapor either poisonous or containing insufficient oxygen. ... 3. Denoting an aerosol composed of particles with aerodynamic size larger than 10 u. ... (05 Mar 2000) ...
Found on http://www.encyclo.co.uk/local/20973

Irrespirable

• (a.) Unfit for respiration; not having the qualities necessary to support animal life; as, irrespirable air.
Found on http://thinkexist.com/dictionary/meaning/irrespirable/

irrespirable

Type: Term Pronunciation: ir′re-spīr′ă-bĕl Definitions: 1. Incapable of being inhaled because of irritation to the airway, resulting in breath-holding. 2. Denoting a gas or vapor either poisonous or containing insufficient oxygen. 3. Denoting an aerosol composed of particles with aerodynamic size larger than 10 μ. .....
Found on http://www.medilexicon.com/medicaldictionary.php?t=45737
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