burr

1. A sharp, pointy object, such as a sliver or splinter.
2. A bur; a seed pod with sharp features that stick in fur or clothing.
3. A small piece of material left on an edge after a cutting operation.
4. 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.
5. A broad iron ring on a tilting lance just below the grip, to prevent the hand from slipping.
6. The ear lobe.
7. The knot at the bottom of an antler.

1. A rough humming sound.
2. A uvular "r".

1. To pronounce with a uvular "r".
2. To make a rough humming sound.

noun

A metal ring at the top of the hand-rest on a spear.

1. A tree growth in which the grain has grown in a deformed manner.
2. Wood of a mottled veneer, usually cut from such a growth.
3. A knot or lump in thread or cloth.