Library / English Dictionary

    ROCK DRILL

    Pronunciation (US): Play  (GB): Play

     I. (noun) 

    Sense 1

    Meaning:

    A drill for penetrating rockplay

    Synonyms:

    bore bit; borer; rock drill; stone drill

    Classified under:

    Nouns denoting man-made objects

    Hypernyms ("rock drill" is a kind of...):

    drill (a tool with a sharp point and cutting edges for making holes in hard materials (usually rotating rapidly or by repeated blows))

    Hyponyms (each of the following is a kind of "rock drill"):

    cross bit (a rock drill having cruciform cutting edges; used in mining)

    star drill (a steel rock drill with a star-shaped point that is used for making holes in stones or masonry; it is operated by hitting the end with a hammer while rotating it between blows)

    straight-fluted drill; straight flute (a rock drill with flutes that are straight)

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