Quite detailed description of the various grades of marijuana.
Making Kief with a 4pc. grinder
Kief or keef, sometimes kef or kif…refers to the resin glands (or trichomes) of cannabis which may accumulate in containers or be sifted from loose dry cannabis buds with a mesh screen or sieve. Kief contains a much higher concentration of desired psychoactive cannabinoids, such as THC, than other preparations of cannabis buds from which it is derived. Traditionally kief has been pressed and baked into cakes as hashish for convenience in storage and shipping, but can be vaporized or smoked in its powder form. Wikipedia definition of Kief
This has got to be the longest and most comprehensive list of names and terms for marijuana I have ever seen!