GRAPHIC CURVE
\ɡɹˈafɪk kˈɜːv], \ɡɹˈafɪk kˈɜːv], \ɡ_ɹ_ˈa_f_ɪ_k k_ˈɜː_v]\
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The course formed on a graphic chart by a line made up of a number of straight lines passing between the contiguous points registered; also the undulating line registered by the needle of the sphygmograph or other like instrument on a moving surface.
By Smith Ely Jelliffe