Definition of Allen screw in English:

Allen screw

Line breaks: Allen screw

Entry from British & World English dictionary

noun

trademark
A screw with a hexagonal socket in the head.

Origin

1930s: from the name of the manufacturer (see Allen key).

Definition of Allen screw in:

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Word of the day anomalous
Pronunciation: əˈnämələs
adjective
deviating from what is standard, normal, or expected