English

Definition of Allen screw™ noun from the Oxford Advanced Learner's Dictionary

 

Allen screw™

 noun
noun
BrE BrE//ˈælən skruː//
 
; NAmE NAmE//ˈælən skruː//
 
 
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a screw with a hole that has six sides Word Origin 1930s: from the name of the manufacturer, the Allen Manufacturing Company, of Hartford, Connecticut.
See the Oxford Advanced American Dictionary entry: Allen screw™