Milk inoculated with a culture of Bacillus acidophilus. ... (05 Mar 2000) ... 
milk fermented with cultures of Lactobacillus acidophilus; used in gastrointestinal disorders to modify the bacterial flora of the intestinal tract.
Milk seeded with living Lactobacillus acidophilus bacteria used to improve the balance of beneficial bacteria in the intestines of the person who drinks the milk. 
Milk to which Lactobacillus acidophilus bacteria have been added to aid in the digestion of lactose (milk sugar). Some humans have difficulty digesting lactose. When they drink regular milk they may suffer diarrhea, abdominal bloating and discomfort.
Type: Term Definitions: 1. milk inoculated with a culture of Bacillus acidophilus.
[n] - milk fermented by bacteria
noun milk fermented by bacteria; used to treat gastrointestinal disorders
a fermented milk produced by growing the bacterium Lactobacillus acidophilus in milk, used in medicine to alter the microbial flora of the intestinal tract under certain conditions.