A burl (American English) or bur or burr (used in all non-US English speaking countries) is a tree growth in which the grain has grown in a deformed manner.
Deformity, in medicine, a major difference in the shape of body part or organ compared to the average shape of that part
Other common causes include metabolic bone diseases (e.g. Paget's disease of bone), post Perthes deformity, osteomyelitis, and post traumatic (due to improper healing of a fracture between the greater and lesser trochanter).
He asks the king if he may be permitted to sit at the gate and to ask one dinar from every person with a deformity (hunchbacked, one-eyed, leprous, etc.).
The first report of Anne Boleyn having any kind of deformity was brought up by Nicholas Sanders, long after her death.
The bony deformity named Deformity type Erlenmeyer flask because of the similarity to the shape of the flask.
This first mummy was examined using X-rays which determined that it was the body of an anencephalic infant "whose cranial deformity gave it the appearance of a miniature adult."