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ABCDEFGHIJKLMNOPQRSTUVWXYZ
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nystatin
Nyungar
nz
NZBC
NZMA
NZRFU
-o
-o-
O (1)
O (2)
O (3)
O (4)
o (1)
o (2)
o (3)
o’
o/a
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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 [World English Edition] © & (P)2008 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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