Etymology
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diesel (adj.)

also Diesel, type of internal combustion engine, 1894, named for Rudolf Diesel (1858-1913), German mechanical engineer who designed this type of engine.

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locomotive (adj.)
1610s, "pertaining to movement," from French locomotif, from Latin loco "from a place" (ablative of locus "place;" see locus) + Late Latin motivus "moving" (see motive).

From 1650s as "moving from place to place;" by 1814 as "having the power of moving by itself. The noun meaning "engine which travels on rails by its own power" is from 1829, short for locomotive engine, which is attested from 1814. A locomotive engine used without rails was a traction engine, which became tractor.
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choo-choo (n.)
Child's name for "steam-engine locomotive," 1895, echoic (choo-choo cars is attested from 1891).
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cow-catcher (n.)

"strong frame in front of a locomotive for removing obstructions such as stray cattle," 1838, from cow (n.) + catcher.

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entrain (v.2)
"get on board a locomotive train," 1860s, from en- (1) "in, into" + train (n.). Related: Entrained.
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locomotor (adj.)
1870, "of or pertaining to locomotion;" probably based on locomotion (as motor/motion). Earlier as a noun, "something with locomotive power" (1822). Related: Locomotory; locomotorial.
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wallbanger (n.)
cocktail made from vodka, Galliano, and orange juice, by 1969, in full Harvey wallbanger. Probably so called from its effect on the locomotive skills of the consumer.
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tender (n.1)
"person who tends another," late 15c., probably an agent noun formed from Middle English tenden "attend to" (see tend (v.2)); later extended to locomotive engineers (1825) and barmen (1883). The meaning "small boat used to attend larger ones" first recorded 1670s.
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decapod (n.)

1819, "ten-legged animal, type of crustacean having ten legs" (crabs, lobsters, shrimp), from French décapode (1806), from Modern Latin Decapoda (animalia), from Greek dekapoda, neuter plural of dekapous "ten-footed" (see ten + foot (n.)). From 1885 in reference to a type of locomotive with ten driving-wheels.

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