Dictionary.net

("distributed fixity"?) A description of anoperator represented by multiple symbols before, between,and/or after the arguments.The classical example is the C conditional operator, "?:"which is writtenE1 ? E2 : E3If E1 is true it returns E2 otherwise it returns E3. Severalfunctional programming languages, e.g. Hope, Haskell,have similar operators ("if E1 then E2 else E3").Objective C messages are effectively distfix operatorapplications:getRow:row andColumn:col ofCell:cellis a message with three arguments, row, col, and cell.