Thats the THC on the buds... Thats what gets u high, and a way too tell if a plant is ready for harvest.. do a searh on yahoo... just type THC, and a lot of thread explains it..
Trich's is a short word for trichomes...aka crystals that grow on the bud. do a search for trichomes in google pictures and youll find a bumch of ppics of trichomes close up. they look like mushrooms.