O

1. Something shaped like the letter O.

   the 15th letter of the Roman alphabet

2. (uncountable)A blood type that lacks A or B antigens and may only receive transfusions of similar type O blood, but may donate to all (neglecting Rh factor). Synonym: universal donor.

3. An utterance of the vocative O.

4. (countable, uncountable)American Library Association abbreviation of octavo, a book size (20-25 cm).

5. (countable, uncountable)Someone associated with Leyton Orient Football Club, as a player, coach, supporter etc.

6. (countable, uncountable)The number of overs bowled.

7. (countable, slang, uncountable)Orgasm.

8. (slang, uncountable)Opium.

1. The chemical formula for water is H₂O.

   Хімічна формула води — H₂O. — deniko

   ruХимическая формула воды - H₂O. — sharptoothed

   deDie chemische Formel für Wasser ist H₂O. — Pfirsichbaeumchen

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2. Your o's look like a's.

   Твої літери «о» схожі на «а». — deniko

   ruТвои "о" похожи на "а". — marafon

   deDeine os sehen wie as aus. — Fingerhut

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3. O positive is the most common blood type.

   ruПервая положительная - самая распространённая группа крови. — marafon

   deDie am häufigsten vorkommende Blutgruppe ist Null positiv. — Pfirsichbaeumchen

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4. My blood type is O positive.

   ruМоя группа крови — первая положительная. — Wezel

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5. My blood type is O negative.

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uncountable

• oalternative