Definition of welt. 1 : a strip between a shoe sole and upper through which they are stitched or stapled together. 2 : a doubled edge, strip, insert, or seam (as on a garment) for ornament or reinforcement. 3a : a ridge or lump raised on the body (as by a blow or allergic reaction)b : a heavy blow.
The list of signs and symptoms mentioned in various sources for Polydactyly includes the 4 symptoms listed below: 1  More toes than normal. 2  More fingers than normal. 3  Extra digit on hand. 4  Extra digit on foot. 5  more information...Â».
What are the symptoms of polydactyly and the different degrees of severity? What causes polydactyly? During normal embryonic development (while the baby is still in the womb), the hand initially forms in the shape of a paddle, and thenâat about the sixth or seventh week of gestationâsplits into separate fingers.