ACID [as-id] What it is: Substances with a pH value less than 7. The opposite of alkaline. VIDEOS RELATED TO THIS TERMGiselle CaballeroFoam TextureDon’t Smash The Bead LEARN MORE TERMSART PALETTEOVAL NAILHYPONYCHIUMHARD GELSCOLORED ACRYLICMOLDINGLED LAMPMATTE TOP COATNAIL PRIMERBLOOMING GELDUST VACUUMMIXED MEDIAPOTASSIUM HYDROXIDENAIL ART PALETTEPATHOGENTOLUENETWO-WAY BUFFERFAN BRUSHBUFFINGWHITE SPOTS PrevNext