The Free On-line Dictionary of Computing (30 December 2018):
("distributed fixity"?) A description of an
operator represented by multiple symbols before, between,
and/or after the arguments.
The classical example is the C conditional operator, "?:"
which is written
E1 ? E2 : E3
If E1 is true it returns E2 otherwise it returns E3. Several
functional programming languages, e.g. Hope, Haskell,
have similar operators ("if E1 then E2 else E3").
Objective Cmessages are effectively distfix operator
getRow:row andColumn:col ofCell:cell
is a message with three arguments, row, col, and cell.