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.
Prince Vlad III, also known as Dracula, currently known as Alexander Grayson, is the main protagonist of the tv series, Dracula. He is also known for being the first vampire to exist. Under the name Alexander Grayson, he arrives in Victorian London in the year 1890, to introduce technology to the society.