Definitions for "Catenary"
Relating to a chain; like a chain; as, a catenary curve.
The curve formed by a rope or chain of uniform density and perfect flexibility, hanging freely between two points of suspension, not in the same vertical line.
A consolidated group of individual strands which, when checked between two fixed points of length, exhibit strands of different lengths. The resulting curve between fixed points of the inextensionable material is defined as catenary. The amount of catenary is measured by the distance between the top-most and lower-most strands when stretched between two fixed points.
Keywords:  ref, traction, contact, electric, line
Ref. Contact Line (CL) or Electric Traction (ET)
Keywords:  devil, caught, sea, blue, deep
Expressions Caught between the devil and the deep blue sea Expressions , Places