chronometer

6 ENTRIES FOUND:

chro·nom·e·ter

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

Examples of CHRONOMETER

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

First Known Use of CHRONOMETER

circa 1735

chro·nom·e·ter

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

chronometer

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.

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