Definitions for "Split custody"
Each of the parents have physical custody of one of more of the children.
A form of custody (generally not looked upon favorably) in which some or one of the parties' children is/are in the custody of one parent and the remaining child(ren) is/are in the custody of the other parent.
A form of custody in which the actual time of physical custody is split between both parents, which gives both parents the right to make decisions.