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 was born in SighiÈoara, Transylvania, in the winter of 1431 to Vlad II Dracul, future voivopde of Wallachia and son of the celebrated Voivode Mircea the Elder. His mother is believed to be the second wife of Vlad Dracul, Princess Cneajna of Moldavia.