lactobacillus
noun
lac·to·ba·cil·lus
ˌlak-tō-bə-ˈsi-ləs 
: any of a genus (Lactobacillus) of bacteria that produce lactic acid
Examples of lactobacillus in a Sentence
Recent Examples on the Web
While these intensive ingredients get to work, lactobacillus ferment, a probiotic, soothes skin to offset any sensitivity.
—
Jennifer Hussein, Allure, 25 Feb. 2025
The elixir pairs ingredients like vitamin E, niacinamide, lactobacillus extract complex, and even SPF 17 to protect against UV rays and improve skin tone, texture, and moisture levels.
—Kiana Murden, Vogue, 31 Jan. 2025
Case in point: Our favorite base makeup is formulated with skin-loving, acne-fighting ingredients like salicylic acid, hyaluronic acid, anti-inflammatory ingredients (like lactobacillus ferment), and beyond.
—Annie Blackman, Allure, 7 Sep. 2024
Plus, skin-care mainstay Centella Asiatica (also known as cica) soothes and calms the scalp, while lactobacillus ferment, a probiotic, balances the microbiome to prevent inflammation.
—Jenny Berg, Allure, 1 Nov. 2024
See All Example Sentences for lactobacillus
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
Jennifer Hussein, Allure, 25 Feb. 2025
The elixir pairs ingredients like vitamin E, niacinamide, lactobacillus extract complex, and even SPF 17 to protect against UV rays and improve skin tone, texture, and moisture levels.
—Kiana Murden, Vogue, 31 Jan. 2025
Case in point: Our favorite base makeup is formulated with skin-loving, acne-fighting ingredients like salicylic acid, hyaluronic acid, anti-inflammatory ingredients (like lactobacillus ferment), and beyond.
—Annie Blackman, Allure, 7 Sep. 2024
Plus, skin-care mainstay Centella Asiatica (also known as cica) soothes and calms the scalp, while lactobacillus ferment, a probiotic, balances the microbiome to prevent inflammation.
—Jenny Berg, Allure, 1 Nov. 2024
See All Example Sentences for lactobacillus
Cite this Entry
“Lactobacillus.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/lactobacillus. Accessed 20 Jun. 2025.
Copy CitationMedical Definition
lactobacillus
noun
lac·to·ba·cil·lus
ˌlak-tō-bə-ˈsil-əs
1
capitalized
: a genus of gram-positive nonmotile lactic-acid-forming bacteria of the family Lactobacillaceae including various commercially important lactic acid bacteria
2
plural lactobacilli
-ˌī also -ˌē
: any bacterium of the genus Lactobacillus
Love words? Need even more definitions?
Merriam-Webster unabridged
Share