chain wheel

[cheyn-hweel, -weel]

chain·wheel

[cheyn-hweel, -weel]
noun Machinery.
sprocket (def. 1).

Origin:
1835–45; chain + wheel
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Chain wheel is always a great word to know.
So is lollapalooza. Does it mean:
a gadget; dingus; thingumbob.
an extraordinary or unusual thing, person, or event; an exceptional example or instance.
Collins
World English Dictionary
chain wheel
 
n
engineering a toothed wheel that meshes with a roller chain to transmit motion

Collins English Dictionary - Complete & Unabridged 10th Edition
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