(organic chemistry) The quaternary ammonium compound [(methylimino)diethylene]bis[ethyldimethylammonium] bromide that blocks the activity of ganglions

Of or pertaining to a convocation.

(meteorology) The altitude in the Earth's atmosphere below which turbulent mixing dominates, at about 60 miles or 100 km, which separates the heterosphere from the homosphere.

Of, pertaining to, or caused by an oncoretrovirus.