Hemimelia is a limb malformation characterized by the absence or gross shortening of the lower portion of one or more of the limbs. The condition is designated according to which bone of the distal arm or leg is absent or defective and includes fibular, radial, tibial, or ulnar hemimelia. Hemimelia ranges in severity. The disease is Monarch Disease Ontology identifier MONDO_0016240 (hemimelia). Also known as: longitudinal meromelia.