(cycling) The slapping sound of the bicycle's chain against the chainstays while riding over rough terrain.

(Australia) Chain used to fetter horses or cattle.

(commerce) A supply chain which is temperature-controlled, important for the supply of certain foods or pharmaceuticals.

(dated, rare) A watch-guard; a chain for a pocket watch.

(nautical) A chain for slinging the lower yards, in time of action, to prevent their falling, if the ropes by which they are hung are shot away.

(physics) A chained series of the products of nuclear decay of a particular isotope

(chess) A locked diagonal formation of pawns, each one supported by a friendly pawn diagonally behind and blocked by an enemy pawn directly ahead.

(organic chemistry) Having carbon atoms arranged in a linear rather than cyclical chain.

(organic chemistry) Having only a single chain of carbon atoms.

Lightning in angular, zigzag, or forked flashes.