ROLLER BIT

Pronunciation (US):

(GB):

 I. (noun) 

Sense 1

Meaning:

A drill bit that has hardened rotating rollers

Synonyms:

rock bit; roller bit

Classified under:

Nouns denoting man-made objects

Hypernyms ("roller bit" is a kind of...):

drill bit; drilling bit (a bit used in drilling for oil)

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