The DICT Development Group

  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">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]

  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]

  borer
      n 1: a drill for penetrating rock [syn: bore bit, borer,
           rock drill, stone drill]
      2: any of various insects or larvae or mollusks that bore into
         wood [syn: woodborer, borer]