Go to MSN Homeencarta®
HomeEncyclopediaDictionaryAtlasK-12 SuccessCollege & Grad SchoolDegrees & TrainingQuizzesMore
Dictionary
Find
in
Dictionary
Thesaurus
Translations
ABCDEFGHIJKLMNOPQRSTUVWXYZ
Click to move up the list of words
antiferromagnetic
antifertility
antifoul
antifouling paint
antifreeze
antigen
antigen feeding
antigen receptor
antigenic drift
antigoglin
Antigone
antigorite
antigravity
Antigua and Barbuda
antihelix
antihero
antihistamine
Click to move down the list of words
Print Preview
See pronunciation key
Search for "antigenic drift" in all of MSN Encarta
E-mail this entry
Blog about this entry on MSN Spaces
Download the MSN Encarta Right-Click Dictionary

antigenic drift
an·ti·gen·ic drift


noun 
Definition:
 
change in viral structure: changes of a minor nature in the antigenic structure of a virus strain. Antigenic drift is the result of natural selection after mixing with a partially immune population.
Encarta® World English Dictionary [North American Edition] © & (P)2007 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
Advertisement

Also on Encarta
• 10 tips for building your English vocabulary
• Alternatives to the M.B.A.
• GPS for students
• Saving for college
• Presidential Myths Quiz
• Coffee break: Recharge your brain
Englishtown: Learn English online
Our Partners
• ApplyWise Online College Admissions Counseling
• The Princeton Review
• Tutor.com: Live Help When You Get Stuck
Also on MSN
• Iditarod: Toughest Race on Earth on the Discovery Channel
• MSN TV Scavenger Hunt: Win the ultimate prize pack
• MSN Shopping: Best books for the season
• MSN Careers: Nail that job interview
• Today's news on MSNBC
Encarta Message Boards (© Rubberball/Jupiterimages)
MSN Shopping
Encarta RSS Feeds
© 2008 Microsoft