offprint

n separate printed copy of an article that is part of a larger publication （书刊中选文的）单行本.

offertory, offhand, offhanded, office, office boy (fem 阴性作 `office girl), office holder (also `office bearer), office hours, office-block, officer, official, officialdom, officialese, officially, officiate, officious, officiously, officiousness, offing, offish, offline, offset, offshoot, offshore, offside, offspring, oft, oft-times, often, ogle, ogre, ogrish, oh, Ohio, ohm, OHMS, oho, oil, oil rig, oil slick, oil well,