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- pronunciation:
- o
- parts of speech:
- noun, adjective
| part of speech: |
noun |
| inflections: |
O's |
| definition 1: |
the fifteenth letter of the English alphabet.
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| definition 2: |
the cipher zero.
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| definition 3: |
one of the four human blood types. (See ABO system.)
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| part of speech: |
adjective |
| definition: |
having the shape of an O; circular.
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