Mariposa, CA. Sponsored Topics. Mariposa (formerly Logtown) is a census-designated place (CDP) in and the county seat of Mariposa County, California, United States. The population was 2,173 at the 2010 census, up from 1,373 at the 2000 census.
aÂ·tomÂ·ic. adj. 1. Of or relating to an atom or atoms. 2. Of or employing nuclear energy: an atomic submarine; atomic weapons. 3. Very small; infinitesimal. aÂ·tomâ²iÂ·calÂ·ly adv.
Atom Definition. Chemistry Glossary Definition of Atom. This is a basic diagram of an atom, with protons, neutrons and electrons labeled. AhmadSherif, Wikipedia Commons. Anne Marie Helmenstine, Ph.D.tom Definition: An atom is the defining structure of an element, which cannot be broken by any chemical means.