ACID [as-id] What it is: Substances with a pH value less than 7. The opposite of alkaline. VIDEOS RELATED TO THIS TERM Scarlett Senter Gelish Cover Tips Don’t Smash The Bead LEARN MORE TERMS SHEER PHALANGES UV DESK LAMP FUNGUS SOAK-OFF GELS LED LAMP VISCOSITY NAIL NIPPER LINT-FREE WIPE SANITIZE DISINFECTANT LACQUER MOISTURIZER ACRYLIC SYSTEM BLOOMING GEL KERATIN CELLS AIRBRUSH CURING LAMP MARBLING TOOL LUNULA SHEER PHALANGES UV DESK LAMP FUNGUS SOAK-OFF GELS LED LAMP VISCOSITY NAIL NIPPER PrevNext