Amongst rude burs and thistles. --Milton.
Bur and brake and brier. --Tennyson.
2. The thin ridge left by a tool in cutting or shaping metal.
See {Burr}, n., 2.
3. A ring of iron on a lance or spear. See {Burr}, n., 4.
4. The lobe of the ear. See {Burr}, n., 5.
5. The sweetbread.
6. A clinker; a partially vitrified brick.
7. (Mech.)
(a) A small circular saw.
(b) A triangular chisel.
(c) A drill with a serrated head larger than the shank; --
used by dentists.
8. [Cf. Gael. borr, borra, a knob, bunch.] (Zo["o]l.) The
round knob of an antler next to a deer's head. [Commonly
written {burr}.]
{Bur oak} (Bot.), a useful and ornamental species of oak
({Quercus macrocarpa}) with ovoid acorns inclosed in deep
cups imbricated with pointed scales. It grows in the
Middle and Western United States, and its wood is tough,
close-grained, and durable.
{Bur reed} (Bot.), a plant of the genus {Sparganium}, having
long ribbonlike leaves.
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. [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, Northumberland, or
Tweedside, burr.
7. The knot at the bottom of an antler. See {Bur}, n., 8.