Capability of living; the state of being viable; usually connotes a fetus that has reached 500 g in weight and 20 gestational weeks. [Fr. viabilité fr. L. vita, life]
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vi·a·bil·i·ty .vī-ə-'bil-ət-ē n, pl -ties the quality or state of being viable: the ability to live, grow, and develop
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vi·a·bil·i·ty (vi″ə-bilґĭ-te) ability to live after birth.Medical dictionary. 2011.