Go to MSN Homeencarta®
HomeEncyclopediaDictionariesWorld AtlasSchoolUniversityStudy CentreQuizzesMore
Dictionary
Find
in
Dictionary
Thesaurus
Translations
ABCDEFGHIJKLMNOPQRSTUVWXYZ
Click to move up the list of words
o/a
o.b.o.
o.c.
o/c
O Canada
o’clock
O/D
o.d. (1)
o.d. (2)
o’er
o.g.
O grade
O level
O & M
o.n.o.
o’nyong-nyong fever
o.o.
Click to move down the list of words
Print Preview
See pronunciation key
Search for "O" in all of MSN Encarta
E-mail this entry
Download the MSN Encarta Right-Click Dictionary

O (1)
O [ ō ] (plural O's or Os)


noun 
Definition:
 
1. 'O'-shaped object: something shaped like a letter 'O'
2. zero: the number zero
3. medicine human blood type: a human blood type of the ABO system containing the O antigen. Somebody with this type of blood can donate to all other types in the group but can receive only type O blood.
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
• Great Writing By Great Writers
• The Latest Top 10 Lists
• Encarta's Famous Quizzes
Also on MSN
• Entertainment on MSN: Top Movies
• MSN Careers: Job Hunting Made Easy
• Today's News on MSN
Encarta Message Boards (© Rubberball/Jupiterimages)
Encarta RSS Feeds
© 2008 Microsoft