clubfoot

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A congenital deformity of the foot, usually marked by a curled shape or twisted position of the ankle, heel, and toes.
• noun A foot so deformed.

from The Century Dictionary.

• noun A deformed or distorted foot; a foot which is set awry from the ankle, and is generally also imperfect in shape or undersized.
• noun A similar twisted condition of the feet which is normal in some animals, as sloths.
• noun [Without the hyphen.] Congenital distortion of the foot; the state of having a clubfoot or club-feet; talipes (which see): as, to be afflicted with clubfoot; the surgical treatment of clubfoot. Also called clubbing.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Med.) A short, variously distorted foot; also, the deformity, usually congenital, which such a foot exhibits; talipes.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun medicine A congenital deformity of the foot in which the ankle, heel and toes are twisted

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun congenital deformity of the foot usually marked by a curled shape or twisted position of the ankle and heel and toes