1. (n.) One that bores; an instrument for boring.

2. (n.) A marine, bivalve mollusk, of the genus Teredo and allies, which burrows in wood. See Teredo.

3. (n.) Any bivalve mollusk (Saxicava, Lithodomus, etc.) which bores into limestone and similar substances.

4. (n.) One of the larvae of many species of insects, which penetrate trees, as the apple, peach, pine, etc. See Apple borer, under Apple.

5. (n.) The hagfish (Myxine).

aculeus acumination bit bore bore bit borer brace and bit breast auger breast drill broach burr chamfer bit corkscrew cross bit cusp diamond drill drill drill press gimlet hand drill keyway drill mucro neb needle nib point portable drill posthole auger power drill prick prickle pump drill ratchet drill reamer rotary drill star drill sting strap drill tap tip trepan trephine twist bit twist drill wimble