[Chimera-users] What is exactly matchDist?

Got 8 x-ray structures. Load them into Chimera and did Structure Comparison -> MatchMaker (with multiple sequence alignment). In the alignment I choose Structure-> Asses Match and it creates a residue attribute named matchDist. I guess is the Distance in angstroms for every alpha carbon in my ith structure (where i=1, 2, 3, ...7) to every matching alpha carbon in my reference structure? Thanks