O字母開頭的單詞或詞組(第11頁)：
- oxychlororaphin
- oxy-flux cutting
- optic disc
- oxidative ammonolysis
- optimization of heat exchanger
- orderly close-down
- obtain
- occlusio torsi
- olimycin
- outer orbital complex
- orismology
- ogo
- ossa purum
- opportunity line
- organophilism
- optical twinning
- orinotherapy
- organ of violence
- oil supply vessel
- oxyspore
- omentorrhaphy
- optical electrons
- overlength charges
- objective test
- omphalic
- one-eyed
- oneself
- overissue bond
- oil supply ship
- overspeed
- ortho-isomer
- occurrence
- oiltight
- orpiment
- obligation in general averange
- otomycosis aspergillina
- oidiomycin
- on-line typewriter
- oil sugar
- ordinary agent