Something abnormal or out of the ordinary. This usually refers to a congenital anomaly or birth defect. Birth defects may be caused by genetic problems, alcohol, medications, and environmental factors, many of which are not well understood.
This is Children's Glossary of Medical Terms - and much more.
You'll find the basic definitions and, for many medical subjects, a larger medical context written by an experienced
Children's pediatrician. All the definitions are in an easy-to-print format.