Hyaline (from the Greek hyalos = glass) refers to extracellular deposits of homogeneous, highly eosinophilic protein substances through which light shines under the microscope.
Hyaline can resemble amyloid, but in contrast to amyloid, these are heterogeneous protein substances (e.g. hyaline degeneration of collagen fibers, "hyaline bodies or so-called cytoid bodies" in lupus erythematosus or lichen planus).