a scleroprotein occurring in the form of fibers that form the skeleton of certain sponges.

1865–70; sponge + -in2

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To spongin
World English Dictionary
spongin (ˈspʌndʒɪn)
a fibrous horny protein that forms the skeletal framework of the bath sponge and related sponges
[C19: from German, from Latin spongiasponge + -in]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
Example sentences
These are characterized by skeletons composed of an organic substance called spongin.
Copyright © 2014 Dictionary.com, LLC. All rights reserved.
  • Please Login or Sign Up to use the Recent Searches feature