Inerting 7 : To inject an inert gas into an atmosphere to render it substantially oxygen-free, or to lower the oxygen content to a point at which combustion cannot take place
Ralph W. Burklin & Robert G. Purington, Fire Terms: A Guide to Their Meaning and Use, National Protection Association, Boston, MA 1980 USA. (Guide: Meaning and Use, Nat Prot Association Fr Srvc - Amer) {457}