prebiotic

1 of 2

adjective

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

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.

2

: of, relating to, or being a prebiotic

… next-generation probiotic microbes administered along with the appropriate prebiotic nutrients to nourish them.

—Michael Pollan

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

Prebiotics are naturally found in certain fruits, vegetables, and herbs, including artichoke, asparagus, bananas, chicory, garlic, and onions.

—Andrew Weil

compare probiotic

Examples of prebiotic in a Sentence

Recent Examples on the Web

Adjective

Prioritize a High Fiber Diet A high-fiber breakfast featuring prebiotic foods, such as oatmeal with kiwi, berries, or prunes, can help promote a morning bowel movement. —Sherri Gordon, Health, 16 Apr. 2026

Cabbage provides prebiotic fiber, which feeds beneficial bacteria in the gut. —Leeann Weintraub, Daily News, 15 Apr. 2026

Noun

Ellsworth, 38, originally brewed up the first iterations of what would later become known as Poppi in 2015 by mixing fruit juice, prebiotics, and sparkling water in her kitchen, marketing the drink as a healthier alternative to classic sodas. —Katie Moore, Fortune, 17 Apr. 2026

Its silky smooth gel formula turns into a refreshing foam when mixed with water, washing away makeup, dirt, and bacteria with the help of prebiotics and antioxidants. —Averi Baudler, PEOPLE, 15 Apr. 2026

Word History

Etymology

Adjective

pre- + biotic

First Known Use

Adjective

1954, in the meaning defined at sense 1

Noun

1995, in the meaning defined above

Rhymes for prebiotic

• aprotic
• aquatic
• biotic
• chaotic
• cirrhotic
• despotic
• dichotic
• erotic
• euphotic
• exotic
• fibrotic
• hieratic

Medical 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

prebiotically

-i-k(ə-)lē

adverb

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