- (n.) Anything extremely small; a particle; a whit.
- (v.t.) To reduce to atoms.
- (n.) The smallest particle of matter that can enter into combination; one of the elementary constituents of a molecule.
- (n.) A constituent particle of matter or a molecule supposed to be made up of subordinate particles.
- (n.) An ultimate indivisible particle of matter.
- (n.) An ultimate particle of matter not necessarily indivisible; a molecule.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). atom. Retrieved September 20, 2026, from http://smartdefine.org/atom/definitions/1976831 |
| Chicago | Webster's. 2011. "atom" http://smartdefine.org/atom/definitions/1976831 (accessed September 20, 2026). |
| Harvard | Webster's 2011, atom, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/atom/definitions/1976831>. |
| MLA | Webster's. "atom" 27 May 2011. Web. 20 September 2026. <http://smartdefine.org/atom/definitions/1976831> |