twist drill
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twist drill
n.
A drill having deep helical grooves along the shank from the point.
twist drill
n
(Tools) a drill bit having two helical grooves running from the point along the shank to clear swarf and cuttings
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Noun | 1. | ![]() bit - the cutting part of a drill; usually pointed and threaded and is replaceable in a brace or bitstock or drill press; "he looked around for the right size bit" |