S: (adj) ternary, treble, triple, triplex (having three units or components or elements) "a ternary operation"; "a treble row of red beads"; "overcrowding made triple sessions necessary"; "triple time has three beats per measure"; "triplex windows"
S: (adj) treble, threefold, three-fold, triple (three times as great or many) "a claim for treble (or triple) damages"; "a threefold increase"