O-a
1.
on or about.
on or about
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- Oaf
[ohf] /oʊf/ noun 1. a clumsy, stupid person; lout. 2. a simpleton; dunce; blockhead. 3. Archaic. /əʊf/ noun 1. a stupid or loutish person n. 1620s, auf, oph (modern form from 1630s), “a changeling; a foolish child left by the fairies” [Johnson], from a Scandinavian source, cf. Norwegian alfr “silly person,” in Old Norse, “elf” […]
- Oafish
[ohf] /oʊf/ noun 1. a clumsy, stupid person; lout. 2. a simpleton; dunce; blockhead. 3. Archaic. /əʊf/ noun 1. a stupid or loutish person adj. 1610s, from oaf + -ish. Related: Oafishly; oafishness. n. 1620s, auf, oph (modern form from 1630s), “a changeling; a foolish child left by the fairies” [Johnson], from a Scandinavian source, […]
- O agglutinin
O agglutinin (ō) n. An agglutinin that reacts with, and is formed as the result of stimulation by, the relatively thermostable antigens present in the cell bodies of microorganisms.