A disputed phenomenon according to which black dogs tend to be passed over for adoption in favor of lighter-colored animals, perhaps because of superstition or the belief that they are more aggressive.

persistent genital arousal disorder

(medicine, pathology) The combined presence of Wernicke's encephalopathy and Korsakoff's syndrome.

A condition of stunted growth in birds.

A rare autosomal-dominant congenital disorder characterized by craniofacial deformities.

A condition caused by occlusion of the hepatic veins that drain the liver, presenting with abdominal pain, ascites and hepatomegaly.

A rare disorder involving cerebellar ataxia, mental retardation, congenital cataracts in early childhood, muscle weakness, inability to chew food, brittle fingernails, and sparse hair.

fibrodysplasia ossificans progressiva

(medical genetics) A genetic disorder that results in small, poorly developed nails, kneecaps, and other body parts.

pine mouth