spongin

(redirected from spongins)
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spon·gin

 (spŭn′jĭn)
n.
A sulfur-containing protein similar to collagen that forms the elastic fibrous structure of certain sponges.

spongin

(ˈspʌndʒɪn)
n
(Biochemistry) a fibrous horny protein that forms the skeletal framework of the bath sponge and related sponges
[C19: from German, from Latin spongia sponge + -in]

spon•gin

(ˈspʌn dʒɪn)

n.
a fibrous protein that is the main constituent of the skeleton in certain sponges.
[1865–70]