chronograph n.

before vowels chron-, word-forming element meaning "time," from Latinized form of Greek khronos "time, a defined time, a lifetime, a season, a while," which is of uncertain origin.

modern word-forming element meaning "instrument for recording; that which writes, marks, or describes; something written," from Greek -graphos "-writing, -writer" (as in autographos "written with one's own hand"), from graphe "writing, the art of writing, a writing," from graphein "to write, express by written characters," earlier "to draw, represent by lines drawn" (see -graphy). Adopted widely (Dutch -graaf, German -graph, French -graphe, Spanish -grafo). Related: -grapher; -graphic; -graphical.