OC
abbr.
off-centre
Office of Censorship (书报、电影、新闻等的)检查局
Officer Candidate 候补军官生
Officer Commanding 指挥官
Old Catholic
on centre 在中心
on course 【航海学】航向正确
oral contraceptive 口服避孕药
original cover 原信封[集邮用语]
Oc.
abbr.
ocean [亦作 oc.]
oc
abbr.
opere citato [拉丁语] 在