a ergonal matter insulator centimeter light
ecballium_elaterium is plant. electrical_insulator is insulating_medium. light_bulb_filament is metal. yttrium is metallic_element. insulation is insulating_material. arctangent is inverse_trigonometric_function. left_ilium is ilium. selenium_cell is photoelectric_cell. insulator is material. gametangium is reproductive_structure.