Main Entry: hy·dro·flu·or·ic acid

Pronunciation: \-ˌflu̇r-ik-, -ˌflōr-, -ˌflȯr-\

Function: noun

: an aqueous solution of hydrogen fluoride HF that is a weak poisonous acid, that resembles hydrochloric acid chemically but attacks silica and silicates, and that is used especially in finishing and etching glass