inertial system

noun

, Physics.

1. 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.

inertial system

noun

1. a frame of reference within which bodies are not accelerated unless acted upon by external forces Also calledinertial reference frame

Word History and Origins

Origin of inertial system¹

First recorded in 1950–55