Source : Webster's Revised Unabridged Dictionary (1913)

Life-giving \Life"-giv`ing\ (-g[i^]v`[i^]ng), a.
   Giving life or spirit; having power to give life;
   inspiriting; invigorating.

Source : WordNet®

life-giving
     adj : giving or having the power to give life and spirit;
           "returning the life-giving humus to the land"- Louis
           Bromfield; "life-giving love and praise"; "the
           vitalizing rays of the warming sun" [syn: {vitalizing}]