reversion
re.ver.sion \ri-'v*r-zh*n, -sh*n\ n [ME, fr. MF, fr. L reversion-, reversio
act of returning, fr. re]versus, pp. 1a: the part of a simple estate
remaining in its owner after he has granted therefrom a lesser particular
estate 1b: a future interest in property left in a grantor or his successor
2: the right of succession or future possession or enjoyment 3: an act or
the process of returning (as to a former condition); esp : a return toward
some ancestral type or condition 4: an act or instance of turning the
opposite way : the state of being so turned 5: a product of reversion;
specif : an organism with an atavistic c haracter