BUR

noun

1. A rough, prickly husk around the seeds or fruit of some plants.
2. Any of several plants having such husks.
3. A rotary cutting implement having a selection of variously shaped heads.

noun

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.

noun

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.