Office of Public Health and Science
1. variant of before a vowel: ophthalmitis. 1. . ophthalmology
ophthalmalgia oph·thal·mal·gi·a (ŏf’thəl-māl’jē-ə, -jə) n. Pain in the eyeball.
[op-uh-rat-ik] /ˌɒp əˈræt ɪk/ adjective 1. of or relating to : operatic music. 2. resembling or suitable for : a voice of operatic caliber. noun 3. Usually, operatics. (used with a singular or plural verb) /ˌɒpəˈrætɪk/ adjective 1. of or relating to opera 2. histrionic or exaggerated adj. 1749, from opera on model of dramatic.
[op-uh-reyt] /ˈɒp əˌreɪt/ verb (used without object), operated, operating. 1. to work, perform, or function, as a machine does: This engine does not operate properly. 2. to work or use a machine, apparatus, or the like. 3. to act effectively; produce an effect; exert force or influence (often followed by on or upon): Their propaganda […]