| OPENSIDES | • opensides n. Plural of openside. • open-sides n. Plural of open-side. • OPENSIDE n. a rugby player who plays on the open side of a scrum. |
| OPENWORKS | • openworks n. Plural of openwork. • OPENWORK n. ornamental work with numerous openings. |
| OPERAGOER | • operagoer n. Someone who attends an opera performance. • opera-goer n. Alternative form of operagoer. • OPERAGOER n. one who attends the opera. |
| OPERANTLY | • operantly adv. In an operant manner. • OPERANT adv. operative. |
| OPERATICS | • operatics n. Exaggerated or overly emotional behaviour; histrionics. • OPERATICS n. the study of opera; histrionic behaviour. |
| OPERATING | • operating adj. In operation; that operates. • operating adj. Involved in an operation. (Can we add an example for this sense?) • operating v. Present participle and gerund of operate. |
| OPERATION | • operation n. The method by which a device performs its function. • operation n. The method or practice by which actions are done. • operation n. The act or process of operating; agency; the exertion of power, physical, mechanical, or moral. |
| OPERATISE | • operatise v. Alternative form of operatize. • OPERATISE v. to turn a play etc. into an opera, also OPERATIZE. |
| OPERATIVE | • operative adj. Effectual or important. • operative adj. Functional, in working order. • operative adj. Having the power of acting; hence, exerting force, physical or moral; active in the production of effects. |
| OPERATIZE | • operatize v. (Transitive) To convert into operatic form. • OPERATIZE v. to turn a play etc. into an opera, also OPERATISE. |
| OPERATORS | • operators n. Plural of operator. • OPERATOR n. one who operates. |
| OPERCELES | • OPERCELE n. an anatomical part that serves as a lid or cover, also OPERCULE, OPERCULUM. |
| OPERCULAR | • opercular adj. (Anatomy) relating to the operculum. • opercular n. (Anatomy) The principal opercular bone or operculum of fishes. • OPERCULAR adj. belonging to the operculum. |
| OPERCULES | • opercules n. Plural of opercule. • OPERCULE n. an anatomical part that serves as a lid or cover, also OPERCELE, OPERCULUM. |
| OPERCULUM | • operculum n. (Zoology) A covering flap in animals, such as a gill cover. • operculum n. (Botany) The lidlike portion of a moss sporangium or of a fruit that detaches to allow the dispersal… • operculum n. (Dentistry) A gum flap covering (part of) a partially erupted tooth, usually a wisdom tooth. |
| OPERETTAS | • operettas n. Plural of operetta. • OPERETTA n. (Italian) a light musical drama with dialogue. |
| OPEROSELY | • operosely adv. In an operose manner. • OPEROSE adv. involving great labour. |
| OPEROSITY | • operosity n. Laboriousness. • OPEROSITY n. laboriousness. |