An instrument that registers or graphically records time intervals such as the duration of an event.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "chronograph" in a sentence
"Velocity may be a disappointment occasionally but the value of a chronograph is the ability to measure the variation from load to load."
"(don't confuse the term chronograph with lots of dials) and I gain 2 seconds a day."
"I, too, believe my Chrony chronograph is giving me honest data."