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.
Dracula is the Slavonic genitive form of Dracul, meaning the son of Dracul (or the Dragon). In modern Romanian, dracul means devil, which contributed to Vlad's bad reputation. Vlad III is known as Vlad ÈepeÈ (or Vlad the Impaler) in Romanian historiography.