Go to MSN Homeencarta®
Dictionary
Find
in
Dictionary
Thesaurus
Translations
ABCDEFGHIJKLMNOPQRSTUVWXYZ
Click to move up the list of words
unbothered
unbound
unbounded
unbowed
unbrace
unbred
unbridle
unbridled
unbroken
unbundle
unburden
unbutton
uncalculated
uncalculating
uncalled-for
uncanny
uncanvassed
Click to move down the list of words
Also available:

World English Dictionary
Dictionnaire Français

uncertainty principle
un·cer·tain·ty prin·ci·ple


noun 
Definition:
 
principle in quantum mechanics: a principle in quantum mechanics holding that it is impossible to determine both the position and momentum of a particle at the same time
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
Advertisement
© 2009 Microsoft