Being the seat or source of life; performing a necessary function in the living body.(adjective)
Gnu Collaboartive International Dictionary of English: licensed under The Code Project Open License (CPOL)
Use "life-sustaining" in a sentence
"I urge anyone going through a divorce to build a life-sustaining support system."
"In late December, The New York Times reported that under new Medicare regulations for annual physical examination, "the government will pay doctors who advise patients on options for end-of-life care, which may include advance directives to forgo aggressive life-sustaining treatment.""
"God did not promise that the atmosphere will forever be healthy and life-sustaining."