Ectromelia

Ectromelia is a congenital absence or incomplete development of one or more long bones of the limbs. The concept includes amelia (a birth defect marked by the absence of one or more limbs); hemimelia (a developmental defect characterized by the absence or severe shortening of the lower portion of one or more limbs); and phocomelia (a developmental defect characterized by the absence of the upper part of one or more limbs).

Bithoracic ectromelia or shortened bones of the forelimbs, has been described in pointers.

The word is also used to describe a contagious disease, caused by a pox virus, which affects laboratory mice and may cause a necrosis of a limb, toe, tail or ear (mouse pox).