Extracting of oils and other substances from plants via boiling. The desired pieces of one or more plants are covered with water that is brought to a boil and kept at that temperature for about 10 minutes. The solution is allowed to cool and is then strained through a filter or cheesecloth.

A results-based science, determined over centuries of observation, that certain plants and crops will grow better when planted not only at a certain season of the year, but during a certain time of the lunar cycle during that season.

The space around and between objects. Most commonly used in reference to art. 

The technique of soaking an herb in a hot liquid, typically water. 

An abnormal growth on tamarisk tree that is created when a gall-wasp deposits eggs on the tree. The tree envelops the eggs, forming a nut-like structure. The mature insects bore through the gall to escape. Tamarisk galls are high in tannins which are used to tan leather.