from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A reference system in which the Newtonian law of motion is valid, specifically one in which a mass m subjected to a force F moves in accordance with the equation F = ma, where a is the acceleration.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a coordinate system in which Newton's first law of motion is valid
Sorry, no etymologies found.