from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A sulfur-containing protein similar to collagen that forms the elastic fibrous structure of certain sponges.

from The Century Dictionary.

  • noun The proper horny or fibrous substance of sponges; ceratose or ceratode. Also spongiolin.

from the GNU version of the Collaborative International Dictionary of English.

  • noun (Physiol. Chem.) The chemical basis of sponge tissue, a nitrogenous, hornlike substance which on decomposition with sulphuric acid yields leucin and glycocoll.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun A horny, sulfur-containing protein related to keratin that forms the skeletal structure of certain classes of sponges proteinaceous compounds of which the spicules in Demospongiae are composed.


Sorry, no etymologies found.


Help support Wordnik (and make this page ad-free) by adopting the word spongin.



Log in or sign up to get involved in the conversation. It's quick and easy.

  • I prefer to think of this as a verb: spongin'.

    July 18, 2012