Chemotype
A chemical classification of cannabis based on cannabinoid and terpene profile rather than botanical taxonomy. More pharmacologically meaningful than indica/sativa distinctions.
In Depth
Cannabis chemotypes are classified by THC:CBD ratio: Type I (THC-dominant, >0.3% THC, <0.5% CBD), Type II (intermediate, significant THC and CBD), Type III (CBD-dominant, <0.3% THC, >0.5% CBD), and Type IV (CBG-dominant). Terpene chemotyping adds further granularity. Chemotype classification is increasingly used in medical cannabis research and clinical practice because it predicts pharmacological effects more reliably than strain names. The same strain name can have dramatically different chemotypes from different producers.
Related Terms
More in Chemistry
Decarboxylation
The chemical process by which a carboxyl group (COOH) is removed from a molecule, releasing CO₂. Converts inactive cannabinoid acids (THCA, CBDA) into their active forms (THC, CBD).
THCA (Tetrahydrocannabinolic Acid)
The acidic, non-psychoactive precursor to THC found in raw, unheated cannabis. Converted to THC through decarboxylation.
CBDA (Cannabidiolic Acid)
The acidic precursor to CBD found in raw cannabis. Converted to CBD through decarboxylation.
Lipophilicity
The tendency of a molecule to dissolve in fats, oils, and non-polar solvents rather than water. Cannabinoids are highly lipophilic.
Myrcene
The most abundant terpene in most cannabis strains. Produces an earthy, musky aroma. Proposed to enhance cannabinoid absorption and contribute to sedating effects.