Industry Terms

Industry Terms & Commonly Used Slang

Scratching your head over what “kief” is? 

Since many of our learners are newbies in the cannabis industry, you might see confusing words or phrases in the community. Browse our glossary to find a variety of cannabis term definitions and become more educated on industry terminology. 

This glossary will clear up the confusion and get you speaking like a native GC'er in no time! Also, please add new glossary terms if you see anything missing.

Browse the glossary using this index

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The part of a cannabis plant seedling that develops into a root, the root tip.


Rastafari, sometimes termed Rastafarianism, is an Abrahamic religion that developed in Jamaica. Scholars of religion and related fields have classified it as both a new religious movement and a social movement. There is no centralized authority in control of the movement and much heterogeneity exists among practitioners, who are known as Rastafari, Rastafarians, or Rastas.


A term commonly used when the cannabis supply is running low and they need to go to their supplier to replenish their stocks. It can also be used as a general term for anyone who needs to buy more cannabis.


A byproduct slime that forms as the result of dabbing - it's essentially the resin-equivalent of an oil rig. You can smoke it, but, like resin, many people find it gross, smelly, and undesirable. It also looks pretty ugly in your uncleaned rig.


Hydroponic system that reclaims the nutrient solution and recycles it.


Recreational drug use is used to intentionally change one’s state of consciousness in order to produce feelings of elation. In the cannabis industry, recreational cannabis can be purchased at a recreational dispensary by anyone who is typically 21 years or older with a valid government-issued identification.


A very broad slang term for cannabis or substances derived, it can be used to refer to the buds themselves but is also used to talk about a bowl, joint, or pipe. It's suspected the name originates with the Spanish word 'grifa,' which means a drug addict. The slang term was popularized through the movie 'Reefer Madness,' an infamous propaganda piece that attempted to demonize the cannabis plant and its users.


A mature plant, having completed its life cycle (flowering) that is stimulated by a new 18-hour photoperiod, to rejuvenate or produce new vegetative growth.

Relative Humidity

Ratio betwee the amount of moisture in the air and the greatest amount of moisture the air could hold at the same temperature.

Residual Solvent

Any remaining solvent contained within a concentrate post-extraction and purging, there are very strict limits on the amount of residual solvent allowed in cannabis products.


Resin may refer to the dark to light brown substance which is scraped off the surface of the trichomes of a cannabis plant. Further, it is widely used to describe the by-product that sticks by the sides of a bowl or other cannabis holding pieces after smoking the product over a period of time. Some people scrap the resin off their paraphernalia, roll it into balls and smoke. It consists of tar, ash, carbon, and less potent cannabinoids, and is considered unhealthy for smoking.

Resin Glands

Tiny pores that secrete resin in cannabis plants.


To moisten or soak in order to soften and separate the cannabis fibers from the woody tissue by partial rotting.


A unique pipe with a nail or skillet used to consume concentrates like wax or shatter. 'Dabbing' involves heating the nail on the rig to a specific temperature with a handheld torch, which evaporates a dab of concentrate when placed on the heated device. This form of consumption is different than smoking from a bowl or pipe with flower and produces a purer inhalation. Dabbing with a rig is quickly gaining popularity in the cannabis industry.


A roach is the end of a joint and is often too small to be smoked for fear of burning ones fingers. As a result, a roach is typically smoked with a roach clip or saved with other roaches to be used in another, stronger joint or added to a bowl. A roach is brown in color because of it high resin consistency due to smoke deposits settling each time it’s inhaled.

Roach Clip

An often metal clip used for holding the end of a joint (roach) as to prevent burning one's fingers.


To weed out inferior, diseased, or undesirable plants from a crop, field, or population area.

Rolling Paper

A specialty paper used for making cigarettes (commercially manufactured filter cigarettes and individually made roll-your-own cigarettes), rolling papers are packs of several cigarette-size sheets, often folded inside a cardboard wrapper.


The underground part of a cannabis plant - roots function to absorb water and nutrients as well as anchor a plant in the ground or to start rooting a cutting or clone.

Root Hormone

A root-inducing substance used for cloning cannabis plants.

Rosin Tech

A solventless extraction method involving the use of a hair straightener or flat iron to apply heat and pressure to cannabis. Using a piece of parchment paper to wrap your flowers or low-grade hash, you set the hair straightener to a specific temperature (opinions vary as to what temperature is best) and then press onto the parchment paper until the oils begin to extract. 

Rotary Evaporator

A piece of machinery used to evaporate and recover ethanol from ethanol-extracted cannabis concentrates.


Ruderalis is one of the three species of cannabis besides Indica and Sativa. Originally, Ruderalis was considered as a wild breed of cannabis that can survive human activities and even adapt to extremely harsh conditions. The plant has small leaves and a short stature that only grows to about 2 feet (or .6 meter) tall hence the name dwarf cannabis. Ruderalis most notable characteristic is its ability to begin flowering based on changes in the plant instead of its environment (auto-flowering). The plant has low Tetrahydrocannabinol (or THC) concentrations making it less favorable for recreational or medical use. It’s native origin is traced back in Russia.

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