viability

n. state of being viable; ability to sustain life outside the womb; feasibility (as of a plan or a venture)

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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(n.)
The quality or state of being viable.
  

(n.)
The capacity of living, or being distributed, over wide geographical limits; as, the viability of a species.
  

(n.)
The capacity of living after birth.
  

Noun
1. (of living things) capable of normal growth and development
(hypernym) property
(classification) living thing, animate thing
2. capable of become practical and useful
(hypernym) practicality