MSN home
Mail
My MSN
Sign in
encarta
greeting cards
more
Hotmail
Messenger
My MSN
MSN Directory
Air Tickets/Travel
Autos
Careers & Jobs
City Guides
Dating & Personals
Food & Entertaining
Games
Green Living
Health & Fitness
Horoscopes
Investing
Lifestyle
Maps & Directions
Money
Movies
Music
News
Real Estate/Rentals
Shopping
Sports
Tech & Gadgets
TV
Weather
White Pages
Yellow Pages
encarta
®
Home
Encyclopedia
Dictionary
Atlas
K-12 Success
College & Grad School
Degrees & Training
Quizzes
More
Additional Reference Materials
Thesaurus
Translations
Multimedia
Other Resources
Education Resources
Foreign Language Help
Project Planner
Scholarships & Financial Aid
Jobs & Internships
Coffee Break
Ask Bill Nye the Science Guy
Top 10 Lists
Columns
On This Day
Help
Dictionary
Find
in
Dictionary
Thesaurus
Translations
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z
nz
NZBC
NZMA
NZRFU
-o
-o-
O (1)
O (2)
O (3)
o
o. (1)
o. (2)
o’
o/a
O.B.E.
o.b.o.
O.C.
Print Preview
See pronunciation key
Search for "
O
" in all of MSN Encarta
E-mail this entry
Blog about this entry on MSN Spaces
Download the MSN Encarta Right-Click Dictionary
O (3)
O
symbol
Definition:
chemical elements
oxygen
Encarta® World English Dictionary [North American Edition] © & (P)2009 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
Our Partners
•
ApplyWise Online College Admissions Counseling
•
The Princeton Review
•
Tutor.com: Live Help When You Get Stuck
Also on MSN
•
"Brink": cutting-edge scientific discoveries on the Science Channel
•
MSN Shopping: Best books for the season
•
MSN Careers: Nail that job interview
•
Today's news on MSNBC
MSN Shopping
MSN Privacy
Legal
Advertise
Newsletter
Worldwide
Feedback
Help
© 2008 Microsoft
Dictionary
Hotmail
Messenger
My MSN
MSN Directory
