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

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

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

A Japanese weapon evolved from the sickle; the kusarigama.

Lightning in angular, zigzag, or forked flashes.

(calculus) A formula for computing the derivative of the functional composition of two or more functions.

A boat fitted up for recovering lost cables, anchors, etc.

(nautical) An opening in the deck, lined with iron, through which the cable is passed into the lockers or tiers.

laburnum / Used other than figuratively or idiomatically: see golden, chain.

A Cunningham chain of the first kind of length n is a sequence of prime numbers (p₁, ..., pₙ) such that for all 1 ≤ i < n, pᵢ₊₁ = 2pᵢ + 1.