viable -
adj. 1 (of a plan etc.) feasible; practicable esp. from an economic standpoint.
2 a (of a plant, animal, etc.) capable of living or existing in a
particular climate etc. b (of a foetus or newborn child)
capable of maintaining life.
3 (of a seed or spore) able to germinate.
viability n. viably adv. [F f. vie life f. L vita]
