Site Map | FAQ

• Editor's Favorites
  • American Indian Heritage Month
  • 2010 Calendar
  • 2009 Calendar and Holidays
  • Twilight Page
  • Thanksgiving
  • Countries of the World
  • 2009 Current Events
  • Top 50 U.S. Cities
  • Color Psychology
  • Holidays in America
  • Most Popular Names
  • The Fifty States

Dictionary

ac•tin•i•um

Pronunciation: (ak-tin'ē-um), [key]
—n. Chem.
a radioactive silver-white metallic element that glows blue in the dark, resembling the rare earths in chemical behavior and valence. Symbol: Ac; at. no.: 89; at. wt.: 227.

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

actinism

actinium emanation

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

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

Find definitions for: