Dictionary.com
Word
of the
Day
Translate
Games
Blog
Thesaurus.com
Favorites
Dictionary.com
Thesaurus.com
My Account
Log Out
Log In
Try Our Apps
definitions
definitions
synonyms
translations
Follow @dictionarycom
follow Dictionary.com
The truth about "stupider"
Favorite Button
CITE
Translate
Facebook
Share
Twitter
Tweet
Google+
Share
rational number
Word Origin
noun
,
Mathematics.
1.
a number that can be expressed exactly by a ratio of two integers.
Origin of
rational number
Expand
1900-1905
1900-05
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
Cite This Source
British Dictionary definitions for
rational number
Expand
rational number
noun
1.
any real number of the form
a
/
b
, where
a
and
b
are integers and
b
is not zero, as 7 or 7/3
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
Cite This Source
rational number
in Science
Expand
rational number
A number that can be expressed as an integer or a quotient of integers. For example, 2, -5, and
^{1}
/
_{2}
are rational numbers.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source
Discover our greatest slideshows
8 Wintry Words
8 Words for Celebration
8 Offbeat Literary Genres to Get...
Decode the pieces of our favorite...
Browse more topics on our blog
What Is the Difference Between Discreet and Discrete?
Learn the correct uses of these two commonly confused homophones.
What Character Was Removed from the Alphabet?
What mistaken pronunciation gave this character its name?
Apostrophes 101
This small mark has two primary uses: to signify possession or omitted letters.
How Do I Get a Word into the Dictionary?
People invent new words all the time, but which ones actually make it?
Word of the Day
Difficulty index for
rational number
Few English speakers likely know this word
Word Value for
rational
8
10
Scrabble
Words With Friends
Nearby words for rational number
rational
rational form
rational fortran
rational function
rational horizon
rational number
rational operation
rational suicide
rational therapy
rational-emotive therapy
rationale
Ghosting Video