'Borer' definitions:

Definition of 'borer'

(from WordNet)
noun
A drill for penetrating rock [syn: bore bit, borer, rock drill, stone drill]
noun
Any of various insects or larvae or mollusks that bore into wood [syn: woodborer, borer]

Definition of 'Borer'

From: GCIDE
  • Borer \Bor"er\, n.
  • 1. One that bores; an instrument for boring. [1913 Webster]
  • 2. (Zool.) (a) A marine, bivalve mollusk, of the genus Teredo and allies, which burrows in wood. See Teredo. (b) Any bivalve mollusk (Saxicava, Lithodomus, etc.) which bores into limestone and similar substances. (c) One of the larv[ae] of many species of insects, which penetrate trees, as the apple, peach, pine, etc. See Apple borer, under Apple. (d) The hagfish (Myxine). [1913 Webster]

Definition of 'borer'

From: GCIDE
  • Hag \Hag\ (h[a^]g), n. [OE. hagge, hegge, witch, hag, AS. h[ae]gtesse; akin to OHG. hagazussa, G. hexe, D. heks, Dan. hex, Sw. h[aum]xa. The first part of the word is prob. the same as E. haw, hedge, and the orig. meaning was perh., wood woman, wild woman. [root]12.]
  • 1. A witch, sorceress, or enchantress; also, a wizard. [Obs.] "[Silenus] that old hag." --Golding. [1913 Webster]
  • 2. An ugly old woman. --Dryden. [1913 Webster]
  • 3. A fury; a she-monster. --Crashaw. [1913 Webster]
  • 4. (Zool.) An eel-like marine marsipobranch ({Myxine glutinosa}), allied to the lamprey. It has a suctorial mouth, with labial appendages, and a single pair of gill openings. It is the type of the order Hyperotreta. Called also hagfish, borer, slime eel, sucker, and sleepmarken. [1913 Webster]
  • 5. (Zool.) The hagdon or shearwater. [1913 Webster]
  • 6. An appearance of light and fire on a horse's mane or a man's hair. --Blount. [1913 Webster]
  • Hag moth (Zool.), a moth (Phobetron pithecium), the larva of which has curious side appendages, and feeds on fruit trees.
  • Hag's tooth (Naut.), an ugly irregularity in the pattern of matting or pointing. [1913 Webster]