English
topsentin
From the sponge Topsentia + -in.
Formed from -in
Today it means
noun A bis(indolyl)imidazole alkaloid derived from sponges, (6-hydroxy-1H-indol-3-yl)-[5-(1H-indol-3-yl)-1H-imidazol-2-yl]methanone
Language periods are conventional ranges, not dates for this word.
Etymograph / topsentin