inhalation analgesia

in·ha·la·tion an·al·ge·si·a

analgesia produced by inhalation of a central nervous system depressant gas (especially nitrous oxide) or vapor.

in·ha·la·tion an·al·ge·si·a

(inhă-lāshŭn anăl-jēzē-ă) Analgesia produced by inhalation of a central nervous system-depressant gas (especially nitrous oxide) or vapor.