op (also Op)

abbr 缩写 = opus: Beethoven's Piano Sonata No 30 in E major, Op 109 贝多芬E大调第30号钢琴奏鸣曲, 作品第109号.

ono, onomatopoeia, onomatopoeic, onrush, onset, onshore, onside, onslaught, onto, onto (also on to), ontological, ontology, onus, onward, onward(s), onyx, oodles, oomph, ooze, op, op art, op-ed, opacity, opague, opal, opalescence, opalescent, opaque, opaquely, opaqueness, OPEC, open, open an account, open cheque, open day, open letter, open out, open prison, open question, open sandwich,