An Etymological Dictionary of Astronomy and Astrophysics

A combining form meaning “something drawn, written” (diagram, spectrogram, oscillogram).

Etymology (EN): From Gk. -gramma, combining form of gramma “something written or drawn,” → graph.

Etymology (PE): -Negâšt, from negâšt “drawn, written;” p.p. of negâštan, negârdan “to paint, write,” → graph.