(n.) A roofing tile, of peculiar form, having a transverse section resembling an elongated S laid on its side (/).

Formica Masonite Tarmac Tarvia alabaster amphibole antimony apatite aplite arsenic asbestos azurite bauxite bitumen bituminous macadam blacktop boron brick brimstone bromine brucite calcite canvas carbon carpeting celestite cement chalcedony chlorite chromite clapboard clay coal cobble cobblestone coke concrete cork tile corundum cryolite curb curbing curbstone diatomite edgestone emery epidote epsomite feldspar fiber glass flag flagging flagstone flooring garnet glauconite graphite gravel gypsum hatchettine holosiderite iron pyrites jet kerb kerbstone kyanite lignite lime linoleum macadam magnesite malachite maltha marcasite marl meerschaum mica mineral coal mineral oil mineral salt mineral tallow mineral tar mineral wax molybdenite monazite obsidian olivine ozokerite pantile paper parquet pavement pavestone paving paving stone peat perlite phosphate rock phosphorus plasterboard plywood pumice pyrite pyrites pyroxene quartz realgar red clay rhodonite road metal rock crystal rocks roofage roofing roofing paper salt selenite selenium shake sheathing board sheeting shingle siderite siding silica silicate silicon slate spar spinel spodumene spun glass stone sulfur talc talcum tar paper tarmacadam tellurium thatch tile tilestone tiling veneer wainscoting wallboard walling wallpaper washboard weatherboard wollastonite wood wulfenite zeolite