Etymology
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radiator (n.)

1832, "any thing which radiates," agent noun in Latin form from radiate (v.). Originally a stove-like apparatus, as a device designed to communicate heat from steam to a room by 1855; the sense of "cooling device in an internal combustion engine" is by 1899.

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fader (n.)
sound control device, 1931, agent noun from fade (v.).
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componentry (n.)

"component parts of a device or system," 1956, from component + -ry.

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after-burner (n.)
1947, "device on the tailpipe of a jet engine to increase thrust," from after + burner.
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loud-speaker (n.)
also loudspeaker, "device for amplifying sound using an electric current," 1898, from loud (adj.) + speaker (n.).
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radiography (n.)

1896, "science or process of making images of objects on a sensitive plate by means of x-rays," from radiograph, the word for such an image-making device; from radio-, combining form of radiation, + -graph. Radiograph was used earlier as "device to measure and record the intensity of sunshine" (1880).

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quipu (n.)

ancient Inca recording device using knotted cords, 1704, from Quechua (Inca) quipu "knot."

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machine (v.)

mid-15c., "decide, resolve," from Old French and Latin usages, from Latin machina "machine, engine, military machine; device, trick; instrument," from Greek makhana, Doric variant of Attic mēkhanē "device, tool; contrivance, cunning" (see machine (n.)). Meaning "to apply machinery to, to make or form on or by the aid of a machine" is from 1878. Related: Machined; machining.

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fylfot (n.)
supposedly a native name for the swastika (used as a decorative device), but only attested in a single, damaged c. 1500 manuscript, and in that it might rather refer to any sort of device used to fill the bottom (foot) of a design. "[I]t is even possible that it may have been a mere nonce-word" [OED].
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humidifier (n.)

"device for making air more humid," 1884, agent noun from humidify.

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