catenary (adj.)

"relating to a chain, like a chain or rope hanging freely from two fixed points," 1872, from Latin catenarius "relating to a chain," from catenanus "chained, fettered," from catena "chain, fetter, shackle" (see chain (n.)). As a noun in mathematics, "catenary curve," from 1788. Related: Catenarian.

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Definitions of catenary from WordNet

catenary (n.)
the curve theoretically assumed by a perfectly flexible and inextensible cord of uniform density and cross section hanging freely from two fixed points;