re·ver·sion /rɪˈvɝʒən, ʃən/
 回復,復原,歸還,繼承權


 re·ver·sion /rɪˈvɝʒən, ʃən/ 名詞
 回復(變異),返祖遺傳,複歸,逆轉,返祖(現象),隔代遺傳


 Re·ver·sion n.
 1. The act of returning, or coming back; return. [Obs.]
    After his reversion home, [he] was spoiled, also, of all that he brought with him.   --Foxe.
 2. That which reverts or returns; residue. [Obs.]
    The small reversion of this great navy which came home might be looked upon by religious eyes as relics.   --Fuller.
 3. Law The returning of an estate to the grantor or his heirs, by operation of law, after the grant has terminated; hence, the residue of an estate left in the proprietor or owner thereof, to take effect in possession, by operation of law, after the termination of a limited or less estate carved out of it and conveyed by him.
 4. Hence, a right to future possession or enjoyment; succession.
    For even reversions are all begged before.   --Dryden.
 5. Annuities A payment which is not to be received, or a benefit which does not begin, until the happening of some event, as the death of a living person.
 6. Biol. A return towards some ancestral type or character; atavism.
 Reversion of series Alg., the act of reverting a series. See To revert a series, under Revert, v. t.

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 reversion
      n 1: (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)
      2: a return to a normal phenotype (usually resulting from a
         second mutation)
      3: a reappearance of an earlier characteristic [syn: atavism,
          throwback]
      4: turning in the opposite direction [syn: reverse, reversal,
          turnabout, turnaround]
      5: returning to a former state [syn: regression, regress, retrogression,
          retroversion]
      6: a failure to maintain a higher state [syn: backsliding, lapse,
          lapsing, relapse, relapsing, reverting]