amfibolin
Amfibolin is a term that can refer to a few different concepts, primarily in geology and biology, though its usage is less common in modern scientific literature. In geology, "amfibolin" historically referred to a group of minerals that are now more precisely classified. These minerals share a common crystal structure and often contain amphibole components, hence the name. Amphiboles themselves are a complex group of inosilicate minerals characterized by their double-chain structure and their tendency to form prismatic crystals. The term amfibolin might have been used as a broader, less defined category before the detailed classification of silicate minerals was established.
In a biological context, "amfibolin" could potentially refer to something that exhibits characteristics of both amphibians