Merriam-Webster Collegiate Dictionary - viable

 adjective  Etymology: French, from Middle French, from vie life, from Latin vita — more at vital  Date: circa 1832  1. capable of living; especially having attained such form and development as to be normally capable of surviving outside the mother's womb a ~ fetus  2. capable of growing or developing ~ seeds ~ eggs  3.  a. capable of working, functioning, or developing adequately ~ alternatives  b. capable of existence and development as an independent unit the colony is now a ~ state  c.  (1) having a reasonable chance of succeeding a ~ candidate  (2) financially sustainable a ~ enterprise  • viability noun  • viably adverb