(geometry) The curve described by a flexible chain or a rope if it is supported at each end and is acted upon by no other forces than a uniform gravitational force due to its own weight and variations involving additional and non-uniform forces.

Relating to a chain; like a chain. / Relating to a catena.

plural of catenary

(architecture) a bridge in which the horizontal deck is suspended from a reverse catenary to counteract bending

plural of catenary bridge