Burr

Part of speech: noun (n.)

1. A prickly seed vessel. See Bur, 1.

2. The thin edge or ridge left by a tool in cutting or shaping metal, as in turning, engraving, pressing, etc.; also, the rough neck left on a bullet in casting. The graver, in plowing furrows in the surface of the copper, raises corresponding ridges or burrs. Tomlinson.

3. A thin flat piece of metal, formed from a sheet by punching; a small washer put on the end of a rivet before it is swaged down.

4. A broad iron ring on a tilting lance just below the gripe, to prevent the hand from slipping.

5. The lobe or lap of the ear.

6. A guttural pronounciation of the letter r, produced by trilling the extremity of the soft palate against the back part of the tongue; rotacism; -- often called the Newcastle, Northumberland, or Tweedside, burr.

7. The knot at the bottom of an antler. See Bur, n., 8.

Part of speech: verb (v.)

To speak with burr; to make a hoarse or guttural murmur. Mrs. Browning.