probiotic

[proh-bahy-ot-ik]
noun
1.
a usually dairy food or a dietary supplement containing live bacteria that replace or add to the beneficial bacteria normally present in the gastrointestinal tract.
2.
a bacterium in such a food or dietary supplement.
adjective
3.
noting or pertaining to a probiotic: a probiotic yogurt drink.

Origin:
1950-55; pro-1 + biotic, on the model of antibiotic

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World English Dictionary
probiotic (ˌprəʊbaɪˈɒtɪk)
 
n
1.  a harmless bacterium that helps to protect the body from harmful bacteria
2.  a substance that encourages the growth of natural healthy bacteria in the gut
 
adj
3.  of or relating to probiotics: probiotic yogurt
 
[C20: from pro-1 + (anti)biotic]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Example sentences
The range of organic probiotic drinks to choose from can cause confusion.
In the dairy case: probiotic yogurt for your insides and milk for your brain.
Feeding mosquitos probiotic-infused nectar could make them resistant to the disease.
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