DictionaryburlRounded knot or growth
noun

burl

BURL/bɜːrl/

A rounded knot or lump in wood or another fibrous material.

A rounded burl protrudes from the old walnut tree's trunk.

A large rounded, bark-covered burl bulges from a tree trunk, with a cut burl section beside it revealing dense swirling and eye-like wood grain.
Etymology

The Old French “tuft of wool” became a small knot in cloth or thread, then a knotlike growth on a tree. The French word’s deeper ancestry is uncertain.

In context

Klondike Craftsman15:54
you get this one with kind of the the natural center of the burl and the rays coming of it
Woodturning | Birch Burl Hollow Form / Vase - Amazing Figure

More examples

  • The woodworker admired the swirling grain inside the burl.
  • Several small burls interrupted the smooth thread.
  • The bowl was carved from a richly patterned burl.

Forms

burl · burls

Similar words

knot
A broader lump or tangle, while a wood burl is an irregular growth.