Site Map | FAQ

• Editor's Favorites
  • Black History Month
  • 2010 Winter Olympics
  • Valentine's Day
  • Profile of Haiti
  • 2010 Calendar
  • Holidays in America
  • Most Populous Countries
  • H1N1 Overview
  • Countries of the World
  • Top 50 U.S. Cities
  • Color Psychology
  • Most Popular Names
  • The Fifty States

Dictionary

at•om

Pronunciation: (at'um), [key]
—n.
1. Physics.
a. the smallest component of an element having the chemical properties of the element, consisting of a nucleus containing combinations of neutrons and protons and one or more electrons bound to the nucleus by electrical attraction; the number of protons determines the identity of the element.
b. an atom with one of the electrons replaced by some other particle: muonic atom; kaonic atom.
2. Energy.this component as the source of nuclear energy.
3. a hypothetical particle of matter so minute as to admit of no division.
4. anything extremely small; a minute quantity.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

atoll

atom-bomb

• • Cite
  • Print
  • Email
  • Bookmark
    • Add bookmark
    • Add to del.icio.us
    • Digg It!
    • Add to Reddit

Related Content Daily Word Quiz: hubris Analogy of the Day: Today's Analogy Spelling Bee: Today's Spelling Bee Kids' Word Quiz: exemplary Crossword: Crossword Puzzle Guide Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language

Find definitions for: