Burl

1. n. An overgrown knot, or an excrescence, on a tree; also, veneer made from such excrescences.
2. v. t. To dress or finish up (cloth); to pick knots, burs, loose threads, etc., from, as in finishing cloth.
3. n. A knot or lump in thread or cloth.

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.