-pus +

A developmental anomaly characterized by an apparent fusion of the lower limbs; especially, the feet.

Symmelia in which there may be three feet (tripodial sympus), two feet (dipodial sympus), one foot (monopodial sympus), or no feet (apodal sympus or sirenomelia).

A subgenus of octopus having two large aquiferous pores on the back of the head.

An African water frog which is native to southern Africa.

From Greek xeno-, "stranger, foreigner" + pous "foot".