Go to MSN Homeencarta®
Dictionary
Find
in
Dictionary
Thesaurus
Translations
ABCDEFGHIJKLMNOPQRSTUVWXYZ
Click to move up the list of words
beta rhythm
beta sheet
beta test
beta transformation
beta-tubulin
beta wave
betaine
betake
betamethasone
betatron
betaware
betaxolol
betcha
bete noire
betel
betel nut
betel palm
Click to move down the list of words
Also available:

World English Dictionary
Dictionnaire Français

beta decay
be·ta de·cay


noun 
Definition:
 
radioactive transformation emitting beta particle: the radioactive transformation of an atomic nucleus during which an electron or positron is produced, although the mass number remains unchanged
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
Advertisement
© 2009 Microsoft