A compartment that encloses the chain and sprocket assemblies of a bicycle

(chemistry) A structural element of a molecule consisting of an unbranched sequence of atoms or simple groups, especially such a sequence of methylene groups in a aliphatic compound

(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

Alternative form of choke chain

(military) The command hierarchy or structure in which one rank obeys the one above it, which obeys the one above it, and so forth.

A dog collar designed to pinch or squeeze the dog or other animal when the leash is pulled.

Woodwardia, native to the Northern Hemisphere. / Tmesipteris, native to the South Pacific

(architecture) A tie consisting of a series of connected iron bars or rods.

A chain in which the alternate links are broad blocks connected by thin side links pivoted to the ends of the blocks, used with sprocket wheels to transmit power, as in a bicycle.