A hair on the surface of a leaf or stem.
For all you noneducated people out their its the sticky-icky shit on weed.
Damn look at those trichomes!
A trichome, when referring to Cannabis (ie Indica) it is not the hair on the surface of a leaf or stem but refers to the crystalline monstrosity on a flowering top. This is sometimes referred to as a resinous gland. I beleive the original poster is the one who is "noneducated". Trichomes are an essential ingredient in Magilla and Heezy Fosheezy.
Trichomes are small appendages that look like hairs, they are produced by marijuana and other plants. Some trichomes on marijuana plants develop a resin gland at the top. These trichomes are a rich source of THC, and monitoring them will allow you to best judge when the plants are ready for harvesting.
On marijuana plants, trichomes with resin glands form in the highest concentration on buds. They start out clear, turn a milky color, then turn amber (light brown). To best judge when to harvest, keep an eye on the trichomes on the buds on each plant.
Do you see the size of those trichomes on that Marijuana