ternary
1. [ adjective ] having three units or components or elements
Synonyms: triple triplex treble
Examples:

"a ternary operation" "a treble row of red beads" "overcrowding made triple sessions necessary" "triple time has three beats per measure" "triplex windows"

Related terms: multiple
2. [ noun ] (mathematics) the cardinal number that is the sum of one and one and one
Synonyms: three 3 trio troika trine threesome trey triad ternion trinity tercet triplet terzetto leash tierce deuce-ace III
Related terms: digit