n. [ Gr.&unr_; path + graph. ] (Math.) A curve described by the moving extremity of a line the other end of which is fixed, this line being constantly parallel to the direction of motion of, and having its length constantly proportional to the velocity of, a point moving in any path; -used in investigations respecting central forces. [ 1913 Webster ]
n. [ L. holographus entirely autograph, Gr.
v. t. To produce a holographic image of, by holography. [ PJC ]
a.
v. t. The process of producing holograms, usually requiring a source of coherent light, as from a laser. [ PJC ]