BURL

v. remove knots or defects from fabric

n. small knot

A burl (British "burr") is a rounded outgrowth on a tree trunk or branch that is filled with small knots from dormant buds. Burls are the product of a cambium.The famous birdseye maple superficially resembles the wood of a burl but is something else entirely.Burls yield a very peculiar and highly figured wood. There are a number of famous burls (each from a particular species); these are highly valued and used as veneers in furniture, picture frames, household objects, automobile interior paneling and trim, and woodturning.
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Noun
1. the wood cut from a tree burl or outgrowth; often used decoratively in veneer
(hypernym) wood
2. a large rounded outgrowth on the trunk or branch of a tree
(hypernym) plant process, enation
(part-holonym) tree
3. soft lump or unevenness in a yarn; either an imperfection or created by design
(synonym) slub, knot
(hypernym) roughness
Verb
1. remove the burls from cloth
(hypernym) remove, take, take away, withdraw
(derivation) slub, knot

v. troat

(v. t.)
To dress or finish up (cloth); to pick knots, burs, loose threads, etc., from, as in finishing cloth.
  

(n.)
An overgrown knot, or an excrescence, on a tree; also, veneer made from such excrescences.
  

(n.)
A knot or lump in thread or cloth.