lifesaving

from WordNet (r) 3.0 (2006)

lifesaving
    n 1: saving the lives of drowning persons; "he took a course in
         lifesaving"

from The Collaborative International Dictionary of English v.0.48

Life-saving \Life"-sav`ing\ (l[imac]f"s[=a]v`[i^]ng), a.
   That saves life, or is suited to save life, esp. from
   drowning; as, the life-saving service; a life-saving station.
   [1913 Webster] life-size