match-merge

Verb

 * 1)  To merge sets of objects while excluding duplicates.
 * The lists are match-merged, so if you are on both lists, you are not twice as likely to be chosen.
 * The lists are match-merged, so if you are on both lists, you are not twice as likely to be chosen.

Noun

 * 1) the process of match-merging
 * The last match-merge produced the list we reported.