Weed
Informal English slang for cannabis, most commonly dried flower.
Weed is just a casual word. It doesn't tell you anything real about what you're buying — not potency, not chemistry, not whether it's actually safe. Modern flower ranges from 10% to 30%+ THC, and strain names are marketing, not science. If you want to know what's in it, read the lab test, not the label.
Definition
Weed is informal English slang for cannabis. In everyday use it most often refers to dried, cured cannabis flowers that are smoked, vaporized, or used to make edibles and extracts. It can also refer more loosely to the plant itself or cannabis as a general category ("do you smoke weed?").
The word carries no technical or scientific meaning. It does not specify potency, cultivar, physical form, or chemistry. A gram of 28% THC flower and a gram of 12% THC flower are both "weed."
Origins
The general English word weed meaning a wild or unwanted plant dates to Old English wēod [1]. The application of "weed" to cannabis is North American slang that emerged in the early-to-mid 20th century alongside other cannabis terms like "marijuana." [2] The slang likely reflects the plant's vigorous, weedy growth habit rather than any judgment about its value.
By the 1960s, weed was established in U.S. counterculture vocabulary and has remained the dominant casual English term in North America since then [2].
What 'weed' usually refers to in practice
When someone says "weed" in a legal market or casually, they most commonly mean dried cannabis flower — the trimmed, cured buds of female plants where cannabinoids like THC and CBD and terpenes concentrate in structures called trichomes [3].
"Weed" is less commonly used to describe:
- Concentrates (typically called wax, shatter, rosin, hash, or concentrates)
- Edibles (called by product name or "edibles")
- Tinctures, topicals, or vape cartridges
This is a usage convention, not a rule. Some people use "weed" to refer to any cannabis product. Context and the speaker's intent matter.
What 'weed' doesn't tell you
The word weed by itself tells you nothing about:
Potency. Modern cannabis flower ranges widely in THC concentration, from under 10% to over 30% by dry weight [4].
Strain or chemovar. Strain names are marketing labels. The "indica vs. sativa" distinction, often cited as predictive of effect, correlates poorly with actual cannabinoid and terpene chemistry [5].
Quality or safety. Cannabis flower sold in regulated, legal markets is typically tested for pesticides, microbes, and heavy metals. Flower from unregulated or illicit sources is not [6].
Legal status. Cannabis remains a Schedule I controlled substance under U.S. federal law as of October 2026, even in jurisdictions where states have legalized it [7].
If you want to know what is actually in a product, consult the certificate of analysis (COA) from a licensed lab, not the slang label.
Usage on Weedpedia
On Weedpedia, we generally use "cannabis" in technical or scientific contexts and "weed" or "flower" in casual writing. See also: cannabis, flower, marijuana.
Sources
- Book Oxford English Dictionary, entry for 'weed, n.1'. Oxford University Press.
- Book Booth, M. (2003). Cannabis: A History. Doubleday/Picador.
- Peer-reviewed Andre, C. M., Hausman, J.-F., & Guerriero, G. (2016). Cannabis sativa: The plant of the thousand and one molecules. Frontiers in Plant Science, 7, 19.
- Peer-reviewed ElSohly, M. A., Chandra, S., Radwan, M., Majumdar, C. G., & Church, J. C. (2021). A comprehensive review of cannabis potency in the United States in the last decade. Biological Psychiatry: Cognitive Neuroscience and Neuroimaging, 6(6), 603-606.
- Peer-reviewed Smith, C. J., Vergara, D., Keegan, B., & Jikomes, N. (2022). The phytochemical diversity of commercial Cannabis in the United States. PLOS ONE, 17(5), e0267498.
- Government U.S. Food and Drug Administration. FDA Regulation of Cannabis and Cannabis-Derived Products: Questions and Answers.
- Government U.S. Drug Enforcement Administration. Drug Scheduling — Marijuana listing under Schedule I of the Controlled Substances Act.
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