What is "chlorine trifluoride"

n. (context inorganic compound English) A poisonous gaseous binary compound, CF₃, of chlorine and fluorine.

Chlorine trifluoride is an interhalogen compound with the formula ClF. This colourless, poisonous, corrosive, and extremely reactive gas condenses to a pale-greenish yellow liquid, the form in which it is most often sold (pressurized at room temperature). The compound is primarily of interest as a component in rocket fuels, in plasmaless cleaning and etching operations in the semiconductor industry, in nuclear reactor fuel processing, and other industrial operations.