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.
While men like Genghis Khan and Timur the Lame and Adolf Hitler were certainly feared in their own times, there is one man whose name (or rather, alias) frightened children for centuries. His name was Vlad III Tepes. Prince Vlad was a prince of Wallachia in the 15th century.