pre·bi·ot·ic
ˌprē-bī-ˈä-tik 
1
: of, relating to, or being chemical or environmental precursors of the origin of life
… it is possible that either the prebiotic molecules necessary for the evolution of life or the raw materials from which these molecules formed were brought to Earth by comet-like objects.—
Marcia Neugebauer
Marcia Neugebauer
also
: existing or occurring before the origin of life
… RNA is a chemically fragile molecule, unlikely to survive the harsh prebiotic conditions. —Michael Egholm et al.
Michael Egholm et al. 2
: of, relating to, or being a prebiotic
… next-generation probiotic microbes administered along with the appropriate prebiotic nutrients to nourish them.—Michael Pollan
Michael Pollan
: a substance and especially a carbohydrate (such as inulin) that is nearly or wholly indigestible and that when consumed (as in food) promotes the growth of beneficial bacteria in the digestive tract
Prebiotics are naturally found in certain fruits, vegetables, and herbs, including artichoke, asparagus, bananas, chicory, garlic, and onions.—Andrew Weil
compare probiotic
Andrew WeilExamples of prebiotic in a Sentence
Recent Examples on the WebNicole Fell, The Hollywood Reporter, 10 May 2024
Oat Fiber is a prebiotic fiber that re energizes the gut-friendly bacteria inside the body and bulks up the stool.
—Amber Smith, Discover Magazine, 3 Apr. 2024
See all Example Sentences for prebiotic 
Adjective
In addition to the food, guests were able to choose from a menu of cocktails made with the new prebiotic soda LEVO, which sponsored the evening.
—Nicole Fell, The Hollywood Reporter, 10 May 2024
Oat Fiber is a prebiotic fiber that re energizes the gut-friendly bacteria inside the body and bulks up the stool.
—Amber Smith, Discover Magazine, 3 Apr. 2024
See all Example Sentences for prebiotic
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'prebiotic.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
Dictionary Entries Near prebiotic
Cite this Entry
“Prebiotic.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/prebiotic. Accessed 29 May. 2024.
Copy CitationMedical Definition
prebiotic
1 of 2 adjective
pre·bi·ot·ic
-bī-ˈät-ik
1
: of, relating to, or being chemical or environmental precursors of the origin of life
prebiotic molecules
also
: existing or occurring before the origin of life
prebiotic conditions
2
: of, relating to, or being a prebiotic
Prebiotic agents included the oligosaccharides inulin, galactose, fructose, lactulose, and combinations of these nutrients.—Josef Neu et al., The New England Journal of Medicine
Josef Neu et al., The New England Journal of Medicine
prebiotically
adverb
-i-k(ə-)lē
prebiotic
2 of 2 noun
: a substance and especially a carbohydrate (such as inulin) that is nearly or wholly indigestible and that when consumed (as in food) promotes the growth of beneficial bacteria in the digestive tract compare probiotic
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