Hyaline (from Greek hyalos = glass) is the term used to describe extracellular deposits of homogeneous, strongly eosinophilic protein substances through which light shines during microscopy.
Hyaline may resemble amyloid; however, in contrast to amyloid, it is a heterogeneous protein substance (e.g. hyaline degeneration of collagen fibres, "hyaline corpuscles or so-called cytoid bodies" in lupus erythematosus or in lichen planus).