a lens containing two or more elements that can be used individually or in combination to provide a variety of focal lengths.
convertin con·ver·tin (kən-vûr’tn) n. See factor VII.
[kuh n-vur-tuh-pleyn] /kənˈvɜr təˌpleɪn/ noun 1. an capable of both vertical flight like a helicopter and fast, forward speed like a conventional airplane. /kənˈvɜːtəˌpleɪn/ noun 1. an aircraft that can land and take off vertically by temporarily directing its propulsive thrust downwards
[kon-ver-tahyt] /ˈkɒn vərˌtaɪt/ noun, Archaic. 1. a . 2. a reformed prostitute. /ˈkɒnvəˌtaɪt/ noun 1. (archaic) a convert, esp a reformed prostitute
[kuh n-vur-ter] /kənˈvɜr tər/ noun 1. a person or thing that . 2. Electricity. a device that converts alternating current to direct current or vice versa. Compare , . 3. Metallurgy. a chamber or vessel through which an oxidizing blast of air is forced, as in making steel by the Bessemer process. 4. Television. (def […]