An Etymological Dictionary of Astronomy and Astrophysics

1. A visual representation of data that displays the relationship among variables, usually cast along X and Y axes.
   

2. In → graph theory, a graph G = (V, E) consists of a set of objects V called vertices and a set E which contains unordered pairs of distinct elements of V called edges.

Etymology (EN): Short for graphic (formula), from L. graphicus “of painting or drawing,” from Gk. graphikos “able to draw or paint,” from graph(ein) “to draw, write” + -ikos, → ic.

Etymology (PE): Negâré, from negâr “picture, figure” (verb negârdan, negâštan “to paint”), from prefix ne-, O.Pers./Av. ni- “down; into,” → ni-, + gâr, from kar-, kardan “to do, to make” (Mid.Pers. kardan; O.Pers./Av. kar- “to do, make, build;” Av. kərənaoiti “he makes;” cf. Skt. kr- “to do, to make,” krnoti “he makes, he does,” karoti “he makes, he does,” karma “act, deed;” PIE base *k^wer- “to do, to make”).