• Alias: ,. • Structural element with built-in meaning. • \[InvisibleComma] is by default not visible on display, but is interpreted on input as an ordinary comma. • \[InvisibleComma] can be used as an invisible separator between indices, as in . • See also: \[AlignmentMarker] , \[Null] , \[InvisibleSpace] , \[RawComma] .