Conversion Rule. If you convert money from a tax-deferred retirement account to a Roth IRA, you must wait at least five years before taking distributions of the converted amounts to avoid the 10 percent early withdrawal penalty. However, you won't pay income taxes on the distribution, because you paid them on the conversion.
Freebase(0.00 / 0 votes)Rate this definition: Polysomy. Polysomy is a condition in which an otherwise diploid organism has at least one more chromosome than normal, i.e. the number of a particular chromosome is not diploid - there may be three or more copies of the chromosome rather than the expected two copies.
Polysemy. 1  a bound collection of pages. 2  a text reproduced and distributed (thus, someone who has read the same text on a computer has read the same book as someone who had the actual paper volume) 3  to make an action or event a matter of record (e.g.