(physics) The unique temperature and pressure at which the solid, liquid and gas phases of a substance are all in equilibrium.

(chemistry) A covalent bond in which three electron pairs (instead of the usual one) are shared between two atoms; most common between carbon atoms and carbon or nitrogen atoms, but a few other forms are known. Symbolized in formulae as ≡.

(basketball) The achievement of a two-digit number of any three of points scored, assists, rebounds, blocks, or steals in a single game.

(baseball) A defensive play in which three outs are recorded. / An offering of three bundled services, especially telephone, television and broadband Internet.

(cricket) three hundred runs scored by a single batsman in one innings, or by two batsmen in a partnership

(finance) Simultaneous expiry on US markets of stock index futures, stock index options, and stock options, which took place on the third Friday of March, June, September, and December. (With the introduction of single stock futures those days are now quadruple witching.)

(golf) A score of three over par (for one hole)

(mathematics) A set of three positive integers a, b and c, for which a²+b²=c²

To perform in this athletics event.

An athletics field event where one has to travel as far as possible after taking one hop, a step, then a jump.