27,261 English Words Starting With O
A blood type that has no antigens. It lacks the A, B and Rh factors on the blood cells. It is the universal donor for blood and can give blood to any blood type, but can only receive O- blood.
Alternative form of Echeng.
Alternative form of Ezhou.
(informal) The wee hours.
(slang) The facial expression made during orgasm.
plural of o-face.
(slang) Alternative spelling of oh for.
plural of o-fer.
(Indo-European studies) In Proto-Indo-European linguistics, an ablaut form of a Proto-Indo-European root, characterised by the presence of the */o/ vowel phoneme in place of */e/.
Alternative form of ǃOǃKung.
A subject-based qualification superseded in England by GCSEs, but still available as an international examination.
plural of O-level.
A random fortune on a strip of paper, available from Shinto shrines and Buddhist temples in Japan in exchange for a small offering.
A circular gasket, usually made of rubber.
plural of O-ring.
(electronics, informal) oscilloscope
plural of o-scope.
Shaped like the capital letter "O", circular.
(linguistics) A word, especially a noun in Indo-European linguistics, whose stem ends in /o/.
plural of o-stem.
Any word beginning with o that is not normally taboo but is considered (often humorously) to be so in the given context.
plural of o-word.
Abbreviation of Ohio.
Abbreviation of Orange County, New York.
Alternative form of OD.
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