\Pi*pa\, n.; pl. {Pipas}. (Zo["o]l.)
The Surinam toad ({Pipa Americana}), noted for its peculiar
breeding habits.
Note: The male places the eggs on the back of the female,
      where they soon become inclosed in capsules formed by
      the thickening of the skin. The incubation of the eggs
      takes place in the capsules, and the young, when
      hatched, come forth with well developed legs.