irreversibility

from WordNet (r) 3.0 (2006)
irreversibility
    n 1: the quality of being irreversible (once done it cannot be
         changed) [ant: {reversibility}]
    
from The Collaborative International Dictionary of English v.0.48
Irreversibility \Ir`re*vers`i*bil"i*ty\, n.
   The state or quality of being irreversible; irreversibleness.
   [1913 Webster]
    

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