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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A plant, such as a tree or a shrub, which completes its life cycle over several years.


Amendment of sand or volcanic glass expanded by heat, which aerates the soil or growth medium.


A scale from 0 - 14 that measure a growing medium's acid to alkaline balance - a pH of 7 is neutral, lower numbers indicate increasing acidity, and higher numbers increasing alkalinity - cannabis grows best in a 6.5 to 8 pH range.

pH Tester

Electronic instrument or chemical used to measure the acid and alkaline balance in soil or water.


When it comes to growing cannabis, a plant’s phenotype is important because it determines a strain’s taste, effectiveness, look and more. Simply put, phenotype is a word used to successfully identify a plant’s inherent traits. Every strain has two parent plants, including a male and female. Like in most breeding of organisms, when a male plant fertilizes a female plant, the seeds that are produced will include genetic phenotypes from both plants. Because people like varying traits from different strains, growers can make a specific strain based on those preferred characteristics.

Phosphor Coating

Internal fluorescent bulb coating that diffuses light and affects various color outputs.

Phosphorus (P)

One of the three primary macronutrients that promote root and flower growth in cannabis plants.


The relationship between the length of light and dark in a 24-hour period - affects the growth and maturity of cannabis.


The building of chemical compounds (carbohydrates that plants need for growth) from light energy, water and carbon dioxide (or CO2).


The environmental response movement of a cannabis plant toward or away from a light source.

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