As nouns the difference between limb and dysmelia
is that
limb is a major appendage of human or animal, used for locomotion (such as an arm, leg or wing) or
limb can be (astronomy) the apparent visual edge of a celestial body while
dysmelia is any congenital disorder of the limbs, such as amelia or syndactyly.
As a verb limb
is to remove the limbs from an animal or tree.