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.
WordReference Random House Unabridged Dictionary of American English Â© 2016. tyâ¢rant (tÄ«â²rÉnt), n. 1  a sovereign or other ruler who uses power oppressively or unjustly. 2  any person in a position of authority who exercises power oppressively or despotically.  a tyrannical or compulsory influence.