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A series of interconnected rings or links usually made of metal.
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A series of interconnected things.
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A series of stores or businesses with the same brand name.
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(organic chemistry, physical chemistry) A number of atoms in a series, which combine to form a molecule.
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(surveying) A series of interconnected links of known length, used as a measuring device.
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(surveying) A long measuring tape.
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A unit of length, exactly equal to 22 yards, which is 4 rods or 100 links, and approximately equal to 20.12 metres; the length of a Gunter's surveying chain; the length of a cricket pitch.
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(mathematics, set theory, order theory) A totally ordered set, especially a totally ordered subset of a poset.
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(algebraic topology, originally) A formal sum of cells in a CW complex of a certain dimension k (in which case the formal sums are called k'''-chains); a formal sum of simplices or cubes of a certain dimension in a simplical complex or cubical complex (respectively).
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(algebraic topology, homological algebra, more generally) An element of a group (or module) in a chain complex.
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(British) A sequence of linked house purchases, each of which is dependent on the preceding and succeeding purchase (said to be "broken" if a buyer or seller pulls out).
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That which confines, fetters, or secures; a bond.
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(nautical, in the plural) Iron links bolted to the side of a vessel to bold the dead-eyes connected with the shrouds; also, the channels.
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A livery collar, a chain of office.
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(weaving) The warp threads of a web.