EXTENSION [ik-sten-shuhn] What it is: Any artificial product that creates an extension of the fingernail. VIDEOS RELATED TO THIS TERM LEARN MORE TERMSNAIL CREAMESSENTIAL OILSOMBRÉADHESIVEPEDICURECROSS-LINKE-FILERHINESTONESDUST EXTRACTIONMULTI-USE IMPLEMENTPROXIMAL NAIL FOLDDAPPEN DISHEMBELLISHMENTMASSAGEDISEASENAIL PLATEABRASIVEAIRBRUSHTHREE-WAY SHINERFUNGUS PrevNext