[{"Bold_text": "noun", "List Items": ["Mathematics.the curve assumed approximately by a heavy uniform cord or chain hanging freely from two points not in the same vertical line. Equation:y=kcosh(x/k).", "(in electric railroads) the cable, running above the track, from which the trolley wire is suspended."]}, {"Bold_text": "adjective", "List Items": ["of, relating to, or resembling a catenary.", "of or relating to a chain or linked series."]}]