O字母開頭的單詞或詞組(第4頁)：

• oxidation eozymes
• oscillationg current
• orientation effect
• oleanane
• optimum reliability
• operating instruction
• oligospermia
• office document architecture
• overseen
• operation rate
• operator command
• operating earnings
• orthometria
• on-off switch
• oil diffusion pump
• oodeocele
• overleaf
• Otomyces hageni
• otolithic membranes
• Ohio Regional Network
• over-shot buffer
• optimum merging pattern
• onychogenic
• octahedral
• odontotomy
• ondometer
• outer hair cells
• organizational authority
• o-aminophenol
• oxotremorine
• office paper
• optimization of code
• oil pudding
• on the hour
• obliterate sth from one's memory
• omphalelcosis
• oil-gauge pipe
• override call
• originating exchange
• o-nitrochlorobenzene