What does GMO stand for? It stands for genetically modified organism, a plant, animal or microorganism whose genetic material has been changed using genetic engineering, in a way that would not happen through natural mating or ordinary breeding. Scientists may add a gene from another species, switch off an existing gene or edit a small stretch of DNA.
You see the letters most often on food packages, in grocery aisles and in news coverage of farming. The term is also a topic of public debate, with people holding different views about how genetically modified foods should be grown, labeled and regulated.
Quick facts
Stands for
Genetically modified organismType
Initialism, said G M OPlural
GMOsSimilar terms
Genetically engineered (GE), bioengineered (BE)Common US crops
Corn, soybeans, cotton, canola, sugar beetsRegulated by
Cannabis slang
A strain name, not a lab altered plant
GMO stands for three ideas
| Letter | Word | Plain meaning |
|---|---|---|
| G | Genetically | Having to do with genes, the DNA instructions inside cells |
| M | Modified | Changed on purpose by scientists |
| O | Organism | Any living thing: a plant, animal, fungus or microbe |
Put together, a GMO is a living thing whose genes were changed directly in a lab. Traditional breeding, such as crossing two kinds of apple trees, also changes genes, but it works by mixing whole plants over many generations. Genetic engineering targets specific genes, which is why it is grouped under its own name.
Real examples of GMOs
- Insect resistant corn and cotton: carry a gene from a soil bacterium that makes a protein harmful to certain crop pests.
- Herbicide tolerant soybeans: survive a weed killer that would damage ordinary soybeans, which lets farmers control weeds more easily.
- Virus resistant papaya: developed to protect Hawaii's papaya crop from ringspot virus.
- Insulin making bacteria: engineered microbes have produced human insulin for people with diabetes since the 1980s.
- Non browning potatoes and apples: modified so that cut surfaces do not turn brown as quickly.
Newer tools such as CRISPR let scientists edit genes with more precision, and some gene edited foods are treated differently from older GMOs under the rules.
GMO labels on US food
Several labels relate to the term, and they mean different things.
| Label | What it tells you |
|---|---|
| Bioengineered or "derived from bioengineering" | The federal disclosure term for foods with detectable genetic material that was modified in a lab |
| Non-GMO | A voluntary claim that the maker avoided genetically modified ingredients, often checked by a private program |
| USDA Organic | Organic rules do not allow genetically engineered seeds or ingredients |
Back of a cereal box: "Contains a bioengineered food ingredient." This is the official federal wording, and it means at least one ingredient, often from corn, soy or sugar beets, came from a genetically engineered crop.
What does GMO stand for in weed?
In cannabis culture, GMO is the name of a popular strain. The letters are often said to stand for garlic, mushroom, onion, a nod to the strain's strong savory smell. It is a nickname, not a sign that the plant was genetically engineered. Cannabis strains are developed by ordinary breeding, and terms such as THC and CBD describe the plant's chemical compounds rather than its genes.
Different views on GMOs
Supporters point to higher yields, fewer insecticide sprays on some crops, and the chance to make crops that resist drought or disease. Major US science and health organizations have concluded that the genetically modified foods now on the market are as safe to eat as their conventional versions.
Critics raise other questions, such as weeds that become resistant to herbicides, effects on small farms, patents on seeds and the right of shoppers to know what is in their food. Labeling rules and the choice of organic or non-GMO products grew out of these debates. Many people simply want clear labels so they can decide for themselves.
Saying and writing GMO
Speakers voice each letter, "G M O," so it counts as an initialism, always set in capitals. Add a lowercase s for more than one, GMOs, and the adjective form is usually written "genetically modified" or "GM," as in "GM crops." Use "a GMO," since the G is spoken as "jee." Other letters from the grocery store and the news appear among our famous acronyms.
Questions people ask
What is GMO stand for in food?
In food, GMO stands for genetically modified organism. It refers to crops or ingredients made from plants whose genes were changed through genetic engineering.
Are GMO and bioengineered the same thing?
They are closely related. Bioengineered is the official term used on US food disclosure labels, while GMO is the everyday term most shoppers know.
What does GMO stand for in weed?
In cannabis slang, GMO is a strain name usually linked to garlic, mushroom, onion, because of its smell. It does not mean the plant was genetically modified.
Is organic food GMO free?
Food certified organic in the US cannot use genetically engineered seeds or ingredients. Small traces can still occur through contact in fields or processing.
What is the difference between GMO and hybrid?
A hybrid comes from cross breeding two related plants the traditional way. A GMO has had its genes changed directly in a lab, sometimes with a gene from a different species.