D defs.my
Entry 2 senses Webster, 1913

Borer

/bôrʹər/ · Bor·er · IPA /ˈbɔːɹɚ/
01 n. One that bores; an instrument for boring.
  1. 1.
    One that bores; an instrument for boring.
  2. 2.
    A marine, bivalve mollusk, of the genus Teredo and allies, which burrows in wood. See Teredo.(Zool.) See: Teredo