amorphozoa

from The Collaborative International Dictionary of English v.0.48

Amorphozoa \A*mor`pho*zo"a\, n. pl. [NL., fr. Gr. ? shapeless;
   'a priv. + morfh` form + ? animal.] (Zool.)
   Animals without a mouth or regular internal organs, as the
   sponges.
   [1913 Webster]