francium
[ fran-see-uhm ]
/ ˈfræn si əm /
Save This Word!
noun Chemistry.
a radioactive element of the alkali metal group. Symbol: Fr; atomic number: 87.
QUIZZES
QUIZ YOURSELF ON AFFECT VS. EFFECT!
In effect, this quiz will prove whether or not you have the skills to know the difference between “affect” and “effect.”
Question 1 of 7
The rainy weather could not ________ my elated spirits on my graduation day.
Words nearby francium
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021
Example sentences from the Web for francium
The last of the original 92 elements to be discovered was element 87, francium.
Why Do “Left” And “Right” Mean Liberal And Conservative?
What Is The Difference Between “It’s” And “Its”?
What Is “GOP” Short For?
“Effectiveness” vs. “Efficacy” vs. “Efficiency”: When To Use Each Word For The Best Results
“Vaccinate” vs. “Inoculate” vs. “Immunize”: What Are The Differences?
9 Of The Most Common Types of Pronouns
British Dictionary definitions for francium
francium
/ (ˈfrænsɪəm) /
noun
an unstable radioactive element of the alkali-metal group, occurring in minute amounts in uranium ores. Symbol: Fr; atomic no: 87; half-life of most stable isotope, 223 Fr: 22 minutes; valency: 1; melting pt: 27°C; boiling pt: 677°C
Word Origin for francium
C20: from New Latin, from France + -ium; so-called because first found in France
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Medical definitions for francium
francium
[ frăn′sē-əm ]
n. Symbol Fr
An extremely unstable radioactive element of the alkali metals, having approximately 19 isotopes, the most stable of which is Fr 223 with a half-life of 21 minutes. Atomic number 87.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Scientific definitions for francium
francium
[ frăn′sē-əm ]
Fr
An extremely unstable, radioactive element of the alkali group. It is the heaviest metal of the group. Francium occurs in nature, but less than 28.35 g (1 oz) is present in the Earth's crust at any time. It has approximately 19 isotopes, the most stable of which is Fr 223 with a half-life of 21 minutes. Atomic number 87; valence 1. See Periodic Table.
The American Heritage® Science Dictionary
Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.