viable

adj. capable of living; having a reasonable chance of succeeding, practical; having the ability to survive outside the uterus (of a fetus)

Viability means in general "capacity for survival" and is more specifically used to mean a capacity for living, developing, or germinating under favorable conditions. The word is especially used in the following contexts:pregnancy, viability refers to either:an early stage pregnancy that has a chance of reaching full-term and a live birth (as opposed to, for example, an ectopic pregnancy); orthe shortest length of pregnancy after which a child born prematurely has a chance of survival. Generally, this ranges from 20-27 weeks.environmental conservation, viability indicates the ability of a conservation target to persist for many generations or over long time periods.experimental biology, viability of cells and tissues refers to the extent to which those cells and tissues are living.natural selection, the fraction of individuals that survive to a given age.economic development, viability indicates the ability of benefits to cover costs in development projects.
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adj. viable, capable of living; having a reasonable chance of succeeding, practical; having the ability to survive outside the uterus (of a fetus)

adj. viable, capable of living

(a.)
Capable of living; born alive and with such form and development of organs as to be capable of living; -- said of a newborn, or a prematurely born, infant.