EXTENSION [ik-sten-shuhn] What it is: Any artificial product that creates an extension of the fingernail. VIDEOS RELATED TO THIS TERM LEARN MORE TERMSHYPONYCHIUMDUST EXTRACTIONPOTASSIUM HYDROXIDETHREE-WAY SHINERTWO-WAY BUFFERART BRUSHESCAMPHORDAPPEN DISHLIQUID & POWDER NAIL ENHANCEMENTCUTICLEPROTEIN HARDENERACRYLATEBASE COATHOLOGRAPHICCONTACT DERMATITISNAIL BITINGMANICUREGLUECROSS-LINKERPEDICURE PrevNext