spon·gin (sp n j n)n. A horny, sulfur-containing protein related to keratin that forms the skeletal structure of certain classes of sponges. |
spongin [ˈspʌndʒɪn]
n
(Life Sciences & Allied Applications / Biochemistry) a fibrous horny protein that forms the skeletal framework of the bath sponge and related sponges
[from German, from Latin spongia sponge + -in]
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