noun \krə-ˈnä-mə-tər\

: a watch or clock that measures time very exactly

Full Definition of CHRONOMETER

:  timepiece; especially :  one designed to keep time with great accuracy


  1. <a fancy new chronometer that is light-years more advanced than your average wristwatch>

First Known Use of CHRONOMETER

circa 1735


noun \krə-ˈnäm-ət-ər\   (Medical Dictionary)

Medical Definition of CHRONOMETER

: an instrument for measuring time; especially : one designed to keep time with great accuracy


noun    (Concise Encyclopedia)

Mechanical timekeeping device of great accuracy, particularly one used for determining longitude (see latitude and longitude) at sea. Early weight- and pendulum-driven clocks were inaccurate because of friction and temperature changes and could not be used at sea because of the ship's motion. In 1735 John Harrison invented and constructed the first of four practical marine timekeepers. The modern marine chronometer is suspended to remain horizontal whatever the inclination of the ship and differs in parts of its mechanism from the ordinary watch. A chronometer may provide timekeeping accurate to within 0.1 second per day. See also Ferdinand Berthoud.


Next Word in the Dictionary: chronometric
Previous Word in the Dictionary: chronomantic
All Words Near: chronometer

Seen & Heard

What made you want to look up chronometer? Please tell us where you read or heard it (including the quote, if possible).

Get Our Free Apps
Voice Search, Favorites,
Word of the Day, and More
Join Us on FB & Twitter
Get the Word of the Day and More