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treadle

[tred-l] /ˈtrɛd l/
noun
1.
a lever or the like worked by continual action of the foot to impart motion to a machine.
2.
a platform, as on a bus or trolleycar, for opening an exit door.
verb (used without object), treadled, treadling.
3.
to work a treadle.
Origin of treadle
1000
before 1000; Middle English tredel stairstep, Old English. See tread, -le
Related forms
treadler
[tred-ler] /ˈtrɛd lər/ (Show IPA),
noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for treadle

treadle

/ˈtrɛdəl/
noun
1.
  1. a rocking lever operated by the foot to drive a machine
  2. (as modifier): a treadle sewing machine
verb
2.
to work (a machine) with a treadle
Derived Forms
treadler, noun
Word Origin
Old English tredel, from trǣde something firm, from tredan to tread
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for treadle
n.

"lever worked by foot," c.1400, from Old English tredel "step, stair," from tredan "to tread" (see tread) + instrumental suffix -el (cf. handle).

Online Etymology Dictionary, © 2010 Douglas Harper
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8
9
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