from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A weak, fundamental interaction between two physical objects due to their mass and energy, especially an interaction occurring between elementary particles.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The fundamental interaction responsible for the gravitational force.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a weak interaction between particles that results from their mass; mediated by gravitons
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