Dictionary
chron•o•graph
Pronunciation: (kron'u-graf", -gräf"), [key]—
n.
1. a timepiece fitted with a recording device, as a stylus and rotating drum, used to mark the exact instant of an occurrence, esp. in astronomy.
2. a timepiece capable of measuring extremely brief intervals of time accurately, as a stopwatch able to record fractions of a second as well as elapsed time.
—
v.t.
to time by means of a chronograph.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.