Simple categories matching isotropic:

• liquid,
• system,
• material,
• conductor,
• plate,
• phase,
• metal,
• antenna,
• polymer,
• particle,
• fluid,
• solid,
• substance,
• solvent,
• medium,
• substrate,
• fiber,

Members with property isotropic:

• si,
• aluminum,
• aluminium_plate,
• steel,
• gold,
• ac,
• bulk_product,
• powdered_glass,
• glass,
• resin,
• sedimentary_rock,
• unstressed_silicon,
• metal,
• liquid,
• aluminium,
• polyurethane_elastomer,
• gas,
• water,
• vitreous_silica,
• beryllium,
• blue_phase,
• polymer,
• air,
• zinc,
• solid_steel,
• soft_ferrite,
• volcanic_glass,
• stainless,
• polystyrene,
• whip_antenna,
• cu,
• hexane,
• tungsten,
• free-electron_gas,
• liquid_ho,
• cement_paste,
• plastic,
• brass,
• glassy_polymer,
• solid_matrix,
• cortical_bone,
• solution,
• indium,
• liquid_helium,
• li,
• glasses,
• aluminium_metal,
• metal_alloy,
• gamma_alumina,
• tetrachloromethane,
• cubic_material,
• gelatin,
• completion_gel,
• pectin,
• biological_solution,
• soil,
• spherical_particle,
• ge,
• glass_compound,
• iron,
• polycrystalline_material,
• aluminium_alloy,
• simple_fluid,
• bulk_liquid,
• polycrystalline_iron,
• nickel,
• paste,
• celluloid,
• common_glass,
• cubic_metal,
• pure_copper,
• pure_metal,
• silica,
• glycerin,
• vesicle_suspension,
• powdered_iron,
• gas_phase,
• al,
• wire,
• cement,
• ag,
• ferrite,
• gel,
• oil,
• powder,
• hydrogen_gas,
• toluene,
• titanium,
• structural_steel,
• co,
• amorphous_silica,
• glycerine,
• rock,
• gd,
• cubic_crystal,
• organic_compound,
• petroleum_pitch,
• nylon,
• ni,
• radio_channel,
• fluid,
• centrosymmetric_crystal,
• copper,
• rubber,
• high_polymer,
• amorphous_material,