Filament
131thick filament — n a myofilament of one of the two types making up myofibrils that is 10 to 12 nanometers (100 to 120 angstroms) in width and is composed of the protein myosin compare THIN FILAMENT …
132thin filament — n a myofilament of the one of the two types making up myofibrils that is about 5 nanometers (50 angstroms) in width and is composed chiefly of the protein actin compare THICK FILAMENT …
