hydrofluoric acid

hy·dro·fluor·ic acid   (hī'drō-flŏŏr'ĭk, -flôr'-, -flōr'-)    n.  A colorless, fuming, corrosive, dangerously poisonous aqueous solution of hydrogen fluoride, HF, used to etch or polish glass, pickle certain metals, and clean masonry.

Main Entry: hy·dro·flu·or·ic acid
Pronunciation: -"flur-ik-, -"flOr-, -"flor-
Function: noun
: an aqueous solution of hydrogenfluoride 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

hydrofluoric acid   (hī'drō-flr'ĭk, -flôr'-)  Pronunciation Key  A colorless, fuming, aqueous solution of hydrogen fluoride. It is corrosive and is used to etch or polish glass, to clean certain metals before plating, and to clean masonry. It is very poisonous.