Urosalpinx cinerea
(gcide) | Drill \Drill\, n.
1. An instrument with an edged or pointed end used for making
holes in hard substances; strictly, a tool that cuts with
its end, by revolving, as in drilling metals, or by a
succession of blows, as in drilling stone; also, a drill
press.
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2. (Mil.) The act or exercise of training soldiers in the
military art, as in the manual of arms, in the execution
of evolutions, and the like; hence, diligent and strict
instruction and exercise in the rudiments and methods of
any business; a kind or method of military exercises; as,
infantry drill; battalion drill; artillery drill.
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3. Any exercise, physical or mental, enforced with regularity
and by constant repetition; as, a severe drill in Latin
grammar.
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4. (Zool.) A marine gastropod, of several species, which
kills oysters and other bivalves by drilling holes through
the shell. The most destructive kind is {Urosalpinx
cinerea}.
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Bow drill, Breast drill. See under Bow, Breast.
Cotter drill, or Traverse drill, a machine tool for
drilling slots.
Diamond drill. See under Diamond.
Drill jig. See under Jig.
Drill pin, the pin in a lock which enters the hollow stem
of the key.
Drill sergeant (Mil.), a noncommissioned officer whose
office it is to instruct soldiers as to their duties, and
to train them to military exercises and evolutions.
Vertical drill, a drill press.
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