Pyridinium Tribromide is used as a brominating agent for organic synthesis especially for pharmaceuticals and hormones. It can be replaced for n-Bromosuccinimide. (N-Bromo derivatives and ammonium tribromides are mainly used as brominating agents)
Top definition. Vlad. Vlad is usually a Russian name, sometimes romanian, and usually is an athletic all around great guy that is good at everything. He is known to have a big penis and is a legend in bed. He has an amazing body and really funny. He is very popular especially with females...fine females.
It's one of those so-called facts that everyone knows: Bram Stoker's character Count Dracula was loosely based on Vlad the Impaler. But while there's no doubt that Stoker took the name from Vlad III's patronymic, it's doubtful that the Impaler was actually the basis for the famous vampire.