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booster (n.)1890, "one who boosts" something, agent noun from boost (v.). Electrical sense is recorded from 1894. Young child's booster chair is attested under that name from 1957 (booster-seat is from 1956). Related: Boosterism (1914).
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jump-start (v.)
Related entries & more also jumpstart, "to start a car engine using battery booster cables," by 1970; see jump (n.) + start (v.). The sense of jump is that in the jump-spark ignition system, attested from 1883 in gas-lighting, from c. 1902 as a common way to start an automobile; hence also jumper "wire used to cut out ('jump over') part of a circuit or to close a gap," a sense attested from 1901 in telegraphy. Related: Jumpstarted; jumpstarting. Figurative use by 1975. Jump-leads "jumper-cables" is from 1969; jumper-cables from 1961.
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