Any of the tubes forming part of the blood circulation system of the body, carrying in most cases oxygen-depleted blood towards the heart.

A fracture in rock containing a deposit of minerals or ore and typically having an extensive course underground.

It comes in a few different forms. The most common is a fine, white powder. It can also be made into a solid rock crystal.

Most users snort the white powder into their nose. Some rub it onto their gums or dissolve it in water and inject it with a needle. Others heat up the rock crystal and breathe the smoke into their lungs.