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.
Vlad III the Impaler. Vlad III, Prince of Wallachia, is more commonly known as Vlad the Impaler. He was born in SighiÈoara, Transylvania, Kingdom of Hungary, in 1431. He was the Prince of Wallachia and ruled there three times, in 1448, 1456â1462 and 1476. In the English-speaking world, Vlad is best known for the legends of his cruelty.