Finite unions of intervals are simple sets that are used quite often, e.g. in measure theory. (The construction of the Cantor set is a noble example). I realised that I do not have a name for them. Is there one? (Pluri-intervsals, multi-intervals, broken intervals,..?)

edit. I am pleased to see that this question is of some interest, thank you all for your comments. Why don't we give answers, each with a single proposal of name, so to see the most voted choices? (Shall I make this community wiki?)