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Record , rec·ord • n. / ˈrekərd/ 1. a thing constituting a piece of evidence about the past, esp. an account of an act or occurrence kept in writing or some o… Recorder , re·cord·er / riˈkôrdər/ • n. 1. an apparatus for recording sound, pictures, or data, esp. a tape recorder. 2. a person who keeps records: a poet and… dosimeter , do·sim·e·ter / dōˈsimitər/ • n. a device used to measure an absorbed dose of ionizing radiation. DERIVATIVES: do·si·met·ric / ˌdōsəˈmetrik/ adj. do·s… Record Player , record player or phonograph, device for reproducing sound that has been recorded as a spiral, undulating groove on a disk. This disk is known as a ph… Artificial Limb , Background
Artificial arms and legs, or prostheses, are intended to restore a degree of normal function to amputees. Mechanical devices that allow am… Phonograph , Phonograph
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The first practical device for recording and reproducing sound was developed by American inventor Thomas Alva Edison (1847–1931)…
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dynamometer