Vi"a*ble (?), a. [F., from vie life, L. vita. See Vital.] Law
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.
⇒ Unless he [an infant] is born viable, he acquires no rights, and can not transmit them to his heirs, and is considered as if he had never been born.
© Webster 1913.