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 History of this Word

"lacto" is from "lac" (milk) spoken by ancient people in central Italy around 700 B.C.


In this sense, it is a word added to another word to form a new word.

Words related to this meaning

grammar is modifier

"lacto-" is a type of prefix


A prefix added to the start of a word. Indicates that "milk" modifies the word. Created to expand meanings. Can be used with many words to form new words.

Examples of how the word is used

lacto- illustration A Lactometer is used to find out the amount of water in the milk that you are drinking.
lacto- illustration Most species of this bacterium ferment glucose into lactose, hence the name Lactobacillus.