A woody outgrowth on the bole or branch of a tree, often caused by an accumulation of dormant buds. Syn. Burl.

An irregular, commonly round growth on a tree stem or branch resulting from the entwined growth of a cluster of adventitious buds and having contorted grain.

"Burl" A mass of tiny knots in the wood which gives an attractive and highly prized blank.

(or burl in the USA) The tightly knotted grain from the base of a tree, used to decorative effect in veneers.

Veneer cut from a root bowl, characterised by patterns of tight circles in the veneer. Considered to be more prestigious, and trickier to work.

A term usually applied to a type of veneer, or perhaps more properly the marks in the veneer itself. The veneer is cut from a knot or other protruding growth on the tree, and as a result displays highly attractive graining. Walnut is especially popular for this, and bird's eye maple is another, particularly well-known type of burr veneer.

Excess material squeezed into the end of tubing or pipe after a cut has been made. This burr must be removed.