lacto-
/ˈlæktəʊ/combining form
1
- of or relating to milk表示（与）乳（有关）的：
lactoscope.
2
- from or relating to lactic acid or lactose表示来自或与乳酸或乳糖有关的：
lactobacillus.
词源
from Latin lac, lact-'milk'.