Newcastle burr

Burr Burr (b[^u]r), n. [See {Bur}.] (Bot.) 1. A prickly seed vessel. See {Bur}, 1. [1913 Webster]

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. [1913 Webster]

The graver, in plowing furrows in the surface of the copper, raises corresponding ridges or burrs. --Tomlinson. [1913 Webster]

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. [1913 Webster]

4. A broad iron ring on a tilting lance just below the gripe, to prevent the hand from slipping. [1913 Webster]

5. The lobe or lap of the ear. [1913 Webster]

6. [Probably of imitative origin.] 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 burr}, {Northumberland burr}, or {Tweedside burr}. [1913 Webster]

7. The knot at the bottom of an antler. See {Bur}, n., 8. [1913 Webster]