"reversion" in the noun sense
law) an interest in an estate that reverts to the grantor (or his heirs) at the end of some period (e.g., the death of the grantee)
genetics) a return to a normal phenotype (usually resulting from a second mutation)
3. atavism, reversion, throwback
a reappearance of an earlier characteristic
4. reversion, reverse, reversal, turnabout, turnaround
turning in the opposite direction
5. regression, regress, reversion, retrogression, retroversion
returning to a former state
6. backsliding, lapse, lapsing, relapse, relapsing, reversion, reverting
a failure to maintain a higher state
Source: WordNet® (An amazing lexical database of English)
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