keyway

 [kee-wey]  

key·way

   [kee-wey]
noun
1.
Machinery. a groove in a shaft, the hub of a wheel, etc., for receiving part of a key holding it to another part.
2.
a slot in a lock for receiving and guiding the key.
3.
(in poured-concrete construction) a longitudinal groove in a footing, or in a pour that has set, providing a key for newly poured concrete.
4.
a depression or slot carved into rock to provide a bond or anchorage for a structure, as a dam.
Origin:
1865–70; key1 + way
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Keyway is always a great word to know.
So is gobo. Does it mean:
a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.
a stew of meat, vegetables, potatoes, etc.
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Collins
World English Dictionary
keyway (ˈkiːˌweɪ)
 
—n
a longitudinal slot cut into a component to accept a key that engages with a similar slot on a mating component to prevent relative motion of the two components

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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