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inertial system

noun Physics.

a frame of reference in which a body remains at rest or moves with constant linear velocity unless acted upon by forces: any frame of reference that moves with constant velocity relative to an inertial system is itself an inertial system.

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Also called inertial reference frame .
Compare law of motion.

Origin of inertial system

First recorded in 1950–55

Words nearby inertial system

inertial fusion, inertial guidance, inertial mass, inertial observer, inertial platform, inertial system, inertial upper stage, inertia-reel seat belt, inertia selling, inertia time, inescapable
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

British Dictionary definitions for inertial system

inertial system

noun

a frame of reference within which bodies are not accelerated unless acted upon by external forcesAlso called: inertial reference frame
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012