• Webster's Revised Unabridged Dictionary
    • n. pl Amorphozoa (Zoöl) Animals without a mouth or regular internal organs, as the sponges.
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Century Dictionary and Cyclopedia
    • amorphozoa De Blainville's name of the sponges and their allies: so called from the absence of regular organic structure in their parts. Now only an inexact synonym of Protozoa.
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Webster's Revised Unabridged Dictionary
NL., fr. Gr. shapeless; 'a priv. + morfh` form + animal


In literature:

The Amorphozoa or shapeless animals include many of the Protozoa and sponges; they have no typical form, and most of them are sessile.
"Form and Function" by E. S. (Edward Stuart) Russell