A rough, prickly husk around the seeds or fruit of some plants.
Any of several plants having such husks.
A rotary cutting implement having a selection of variously shaped heads.
A tree growth in which the grain has grown in a deformed manner; a burr knot.
Wood of a mottled veneer, usually cut from such a growth.
A knot or lump in thread or cloth.
To remove the knots in cloth.