chronometer definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
an instrument for measuring time precisely; highly accurate kind of clock or watch, as for scientific use
Origin: chrono- plush -meter
chronometer definition by American Heritage Dictionary
The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
An exceptionally precise timepiece.
- chronˌo·metˈric , chronˌo·metˈri·cal adjective
- chronˌo·metˈri·cal·ly adverb
chronometer - Science Definition
An extremely accurate clock or other timepiece. Chronometers are used in scientific experiments, navigation, and astronomical observations. It was the invention of a chronometer capable of being used aboard ship, in 1762, that allowed navigators for the first time to accurately determine their longitude at sea.