What does "lactobacillus" mean?

Any of many rod-shaped, nonmotile, aerobic bacteria, of the genus Lactobacillus, that ferment sugars to form lactic acid

Lactobacillus

Common synonyms include: beneficial bacteria, fermentative bacteria, friendly bacteria, lactic acid bacteria, lactobacilli, probiotic bacteria.

noun

noun ·5 syllables ·Rare ·Advanced level

Noun

1
Any of many rod-shaped, nonmotile, aerobic bacteria, of the genus Lactobacillus, that ferment sugars to form lactic acid
2
a Gram-positive rod-shaped bacterium that produces lactic acid (especially in milk) wordnet

From the genus name. lacto- + bacillus