Wiktionary
boron trifluoride
n. (context inorganic compound English) A binary compound of boron and fluorine, BF3; it is a strong Lewis acid.
WordNet
boron trifluoride
n. a pungent colorless gas
Wikipedia
Boron trifluoride
Boron trifluoride is the inorganic compound with the formula BF. This pungent colourless toxic gas forms white fumes in moist air. It is a useful Lewis acid and a versatile building block for other boron compounds.
Usage examples of "boron trifluoride".
He got the little bottle of boron trifluoride out of the dashboard and applied a few drops with an eyedropper to the elastomer line, just forward of the bowline knot that hitched it to an interior stanchion.