What Is THC? Understanding THC
If you have ever looked at a cannabis product label, you have probably noticed a number displayed prominently next to three letters: THC. For many consumers, that number becomes the…
Cannabis has its own language, and it gets confusing fast. You will hear scientific words, dispensary shorthand, and older slang all used in the same conversation. At Garden Club Dispensaries, we see it every day. Someone is trying to shop confidently, but the menu reads like a different planet.
This glossary is here to make shopping and conversations easier. These definitions follow common industry usage, plus the way cannabis terms are described in consumer education and public health resources.
Adult-use (Recreational). Cannabis that can be purchased by adults in states where it is legal, typically starting at age 21. You will also hear “adult-use” used to distinguish recreational programs from medical ones.
Medical cannabis. Cannabis sold through a medical program, usually requiring a qualifying condition and registration depending on state rules. “Medical” often affects things like taxes, product access, and purchase limits.
Dispensary. A licensed retail store where cannabis products are sold. Some locations are medical-only, some are adult-use, and some serve both, depending on state law.
Budtender. A dispensary staff member who helps customers understand products and make choices based on goals, tolerance, and preferences. “Budtender” is informal, but widely used across legal markets.
Menu. The dispensary’s product list, usually organized by category (flower, pre-rolls, concentrates, vapes, edibles, tinctures, topicals). Many menus update throughout the day based on inventory.
COA (Certificate of Analysis). A lab report for a product batch that lists cannabinoid potency and may list terpene content and contaminant testing, depending on state requirements and product type.
Batch. A specific production run of a product. Lab tests and COAs typically apply to a specific batch, not a product name forever.
Potency. How strong a product is in terms of cannabinoids, usually measured as a percentage for flower and concentrates, and milligrams (mg) for edibles and tinctures.
Milligram (mg). A unit used to describe cannabinoid dose in edibles, tinctures, capsules, and many concentrates. A package might contain 100 mg THC total, with 10 mg per serving.
Serving. The intended portion size for a product, most commonly used with edibles. “Serving” does not guarantee it is the right dose for you.
Cannabis. The plant genus that includes hemp and marijuana-type varieties. “Marijuana” is still used in laws and casual speech, but “cannabis” is the preferred scientific and industry term.
Flower (Bud). The harvested part of the cannabis plant that people smoke or vape. It is also the starting material for many extracts.
Cultivar. A cultivated variety of cannabis. Many educators prefer “cultivar” over “strain” because it is more botanically precise, especially when names are inconsistently used across growers.
Strain. A common term for a named variety of cannabis, but the same name can vary between producers, which is why terpene profiles and lab results can be more reliable than name alone.
Indica, Sativa, Hybrid. Traditional categories used to describe expected effects and plant traits. In modern markets, these labels often track aroma and terpene trends more than strict genetics, which is why many shoppers get better results focusing on cannabinoid and terpene profiles.
Trichomes. Tiny resin glands on flower that contain cannabinoids and terpenes. If flower looks “frosty,” you are seeing trichomes.
Kief. The collected trichome heads that sift off flower, often used to boost potency or pressed into hash.
Curing. A controlled drying and aging process that helps stabilize flower, preserve aroma, and improve smoke quality. Poor curing often means harsher smoke and flatter flavor.
Terpene profile. The mix of terpenes present in a flower or extract, typically listed as the top few terpenes plus percentages when available.
Phenotype (Pheno). Different expressions of the same genetic line. Two plants from the same seed pack can produce different aromas, structure, and effects, even with the same “strain” name.
Clone. A cutting taken from a mother plant to produce a genetically identical plant. Clones are used to keep products consistent.
Landrace. Cannabis genetics associated with a specific region where it adapted over generations. True landraces are less common in modern retail because so much cannabis has been crossbred.
Heirloom. A line preserved and grown for a long time outside its original region, often tied to classic genetics maintained through cultivation history.
Cannabinoids. Compounds produced by cannabis (and also by the human body) that interact with the endocannabinoid system. THC and CBD are the most well-known, but there are many others.
THC (Delta-9 THC). The primary intoxicating cannabinoid in cannabis. It is most associated with euphoria, altered perception, and impairment at higher doses.
THCA. The acidic precursor to THC found in raw flower. Heat converts THCA into THC through decarboxylation, which is why flower can test high in THCA but still feel “high THC” when smoked or vaped.
CBD. A non-intoxicating cannabinoid commonly used by people seeking calm or body comfort with less “high” feeling than THC.
CBDA. The acidic precursor to CBD, found in raw plant material before heat converts it.
CBG. A cannabinoid sometimes called a “parent” cannabinoid because it is involved earlier in the plant’s cannabinoid synthesis pathways.
CBN. A cannabinoid often marketed for sleep-focused products. Evidence and experiences vary, and it is frequently formulated with other cannabinoids.
Delta-8 THC. A cannabinoid related to delta-9 THC. Products labeled delta-8 can be intoxicating. Availability and regulation differ by state.
Decarboxylation (Decarb). The process of using heat to convert acidic cannabinoids (like THCA) into their active forms (like THC). This happens when smoking, vaping, dabbing, or cooking.
Full-spectrum. A product that contains a range of cannabinoids and other plant compounds rather than a single isolated cannabinoid. “Full-spectrum” is used differently by brands, so COAs help.
Broad-spectrum. Typically means multiple cannabinoids and plant compounds with THC removed or reduced, depending on the brand and regulations.
Isolate. A purified product containing one cannabinoid, such as CBD isolate.
Microdosing. Using very small amounts of THC (or cannabis) to get subtle effects with minimal impairment.
Tolerance. Reduced sensitivity to THC or other effects after frequent use, often leading people to need higher doses to feel the same intensity.
Set and setting. Your mindset (“set”) and environment (“setting”). The same product can feel very different depending on stress level, sleep debt, social context, and surroundings.
Endocannabinoid system (ECS). A signaling network in the human body involved in maintaining balance across processes like mood, stress response, appetite, and more.
CB1 receptor. A cannabinoid receptor found heavily in the brain and nervous system, one reason THC can cause intoxication and impairment.
CB2 receptor. A receptor associated more with immune signaling and peripheral tissues.
Endocannabinoids. Cannabinoid-like compounds your body makes naturally, often described as produced “on demand.”
You do not need to memorize these to shop. They are useful when you want to understand why cannabinoids can feel body-wide instead of localized.
Terpenes. Aromatic compounds found in cannabis and many other plants. They drive scent and flavor and may influence how cannabis feels alongside cannabinoids.
Myrcene. Often associated with earthy, musky aromas and a heavier, more relaxing feel for many shoppers.
Limonene. Citrus-peel aroma, often described as bright or uplifting.
Pinene. Pine aroma, often described as crisp or clear.
Linalool. Floral, lavender-like aroma, often associated with calm, wind-down vibes.
Beta-caryophyllene. Peppery, warm spice aroma, commonly found across many cultivars.
When terpene panels are available, focus on the top three to five terpenes. That usually tells you more than a strain name alone.
Concentrates (Extracts, Dabs). Products made by extracting cannabinoids and terpenes from cannabis to create a more potent form than flower.
Dab. A small dose of concentrate. “Dabbing” means vaporizing a concentrate, usually on a heated surface.
Live resin. A concentrate made using fresh-frozen plant material to preserve terpene character.
Rosin. A solventless extract made using heat and pressure, often praised for flavor. “Live rosin” typically means rosin made from fresh-frozen starting material.
Distillate. A refined oil where cannabinoids (often THC) are separated and concentrated. Terpenes may be removed and then added back depending on the product.
Shatter. A brittle, glass-like concentrate texture.
Wax. A general term for softer concentrate textures.
Budder (Badder). A whipped, creamy concentrate texture.
Crumble. A dry, crumbly concentrate texture.
Sauce. A terpene-rich concentrate texture, often paired with crystals.
Diamonds. Crystalline THCA formations often found in concentrate products, sometimes suspended in sauce.
Hash. A concentrate made from collected trichomes. Traditional hash methods vary by region and technique.
Bubble hash (Ice water hash). Hash made by agitating cannabis in ice water and filtering trichomes through mesh bags.
RSO (Rick Simpson Oil). A thick, highly concentrated cannabis oil often used orally. It is usually very potent, so dosing is typically tiny.
FECO (Full Extract Cannabis Oil). Another full-extract oil style that may overlap with how people describe RSO, depending on the brand.
If you are new to concentrates, the key is not chasing the strongest product. It is choosing the right format, then learning dose and timing.
Smoking. Combusting flower in a joint, bowl, bong, or blunt. Onset is fast, but combustion produces smoke.
Vaping (Vaporization). Heating cannabis to release vapor rather than burning it. Many people choose vaping for smoother experience, but product quality and device settings matter.
Vape pen. A portable device used with cartridges or concentrate attachments.
Cartridge (Cart). A pre-filled vape container, often attached to a battery.
Edibles. Food or drink products infused with cannabinoids. Effects are delayed and can last longer than inhalation.
Onset. How long it takes to feel effects. Inhalation onset is typically minutes, edibles often take much longer.
Duration. How long effects last. Edibles generally last longer than inhalation.
Tincture. A liquid cannabis product taken orally or sublingually, often designed for measured dosing.
Sublingual. Absorbing a product under the tongue before swallowing.
Topical. A product applied to skin, often used for localized comfort.
Transdermal. Designed to deliver cannabinoids across the skin barrier, often marketed as longer-lasting, but product design varies.
Pre-roll. A ready-to-smoke joint sold by a dispensary.
Infused pre-roll. A pre-roll that includes added concentrate for higher potency.
Blunt. Cannabis rolled in a tobacco leaf or cigar wrap. Some people use “blunt” loosely, but traditionally it implies a tobacco wrap.
Joint. Cannabis rolled in paper for smoking.
Bong. A water pipe used for smoking flower.
Bubbler. A handheld pipe with water filtration.
Rig (Dab rig). A water pipe designed for vaporizing concentrates.
Banger. A quartz or glass piece heated for dabbing.
E-nail. An electronic heating device for more consistent dab temperatures.
You do not need these to buy products, but knowing them makes conversations quicker.
Child-resistant packaging. Packaging designed to be difficult for children to open, required in many markets.
Impairment. Reduced coordination, reaction time, or judgment, most associated with THC. Plan ahead if you are using THC, especially with edibles.
Start low, go slow. A common safety guideline, especially for edibles and high-potency products, because onset can be delayed and overconsumption is uncomfortable.
Dose. The amount of cannabinoids you consume, usually measured in mg for edibles and tinctures. “Dose” is not the same as THC percentage on flower.
Purchase limit. The maximum amount a customer can purchase in a day, which varies by state and by medical vs adult-use rules.
Seed-to-sale. A tracking system used in regulated markets to monitor cannabis from cultivation through retail.
If you want one practical takeaway, it is this. When you shop, try translating your goal into three pieces of information: your preferred format (flower, edible, vape, tincture), your comfortable THC range (low, moderate, high), and your terpene direction (bright and citrusy, earthy and heavy, piney and clear, floral and calm). That usually leads to better outcomes than shopping by strain name alone.
And if a term still feels fuzzy, ask us at Garden Club Dispensaries. A good budtender can turn a confusing label into a simple plan that fits your night, your tolerance, and the kind of experience you actually want.
