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.
Zombie is defined as a dead person who is animated but in a trance and has no free will, or a person behaving in that manner. An example of a zombie is a character in a fictional movie who chases after people with arms outstretched. zombie. Informal a person considered to be like a zombie in listlessness, mechanical behavior, etc. zombie.