O字母開頭的單詞或詞組(第1頁)：
- O
- o-
- O agglutination
- O agglutinin
- O antigen
- o attenuator
- o carboxy cinnamic acid
- O colony
- o-(carbamoylphenoxy)acetic acid
- o-(p-anisoyl) benzoic acid
- O,O-diethyldithiophosphoric acid
- O,O-diethyl-S-(1,2-dicarboethoxyethyl) dithiophosphate
- O,O-diethylthiophosphoryl chloride
- O,O-dimethyl thiophosphoryl chloride
- O,O-dimethyldithiophosphoric acid
- o,p'-dianiline
- o,p-dihydroxy-azo-p-nitrobenzene
- O.
- O. B.
- O. C.
- O. D.
- O. D. A.
- O. D. P.
- O. D. T.
- O. L.
- O. L. T.
- o. m.
- o. n.
- O. S.
- O. U.
- O.K.
- O.L.A.
- O.L.P.
- O2
- O-2 poisoning
- O3
- OA
- O-acetylcarnitine
- O-acylcarnitine
- oaf
- oafish
- oafs