GNU Collaborative International Dictionary of English

Found 3 definitions 

  1.       

    Ferrule , n. [Formerly verrel, F. virole, fr. L. viriola little bracelet, dim. of viriae, pl., bracelets; prob. akin to viere to twist, weave, and E. withe. The spelling with f is due to confusion with L. ferrum iron.] [Sometimes spelled ferule.]
    1. A ring or cap of metal put round a cane, tool, handle, or other similar object, to strengthen it, or prevent splitting and wearing.
      1913 Webster
    2. (Machinery) Any of various circular or cylindrical metal objects used at joints in a tube, pipe, or rod, especially to assist making a tight seal at a joint.
      PJC
    3. Hence: (Steam Boilers) A bushing for expanding the end of a flue to fasten it tightly in the tube plate, or for partly filling up its mouth.
      1913 Webster
    4. Hence: (Chemistry) A bushing used at the joints of metal tubing in HPLC equipment to make a tight seal.
      PJC
    5. (Fishing) One of several small rings at the top of a casting rod which holds the fishing line. RHUD
      PJC
    
      
    
  2.       

    Ferule , n. [L. ferula: cf. F. férule. See Ferula.]
    1. A flat piece of wood, used for striking, children, esp. on the hand, in punishment.
      1913 Webster
    2. A ferrule. [R.]
      PJC
    
      
    
  3.       

    Ferule , v. t. [imp. & p. p. Feruled ; p. pr. & vb. n. Feruling.] To punish with a ferule.
    1913 Webster