noun Etymology: German, from Latin spongia sponge Date: circa 1868 a scleroprotein that is the chief constituent of flexible fibers found in certain sponge skeletons
SPONGIN
Meaning of SPONGIN in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012