The word "lime" is related to a lot of other words-an old Greek word meaning "a moist meadow", Latin words meaning "mud" or "slime", and an Old English word "loam." There are many different kinds of limestone. Some of them have been used for hundreds of years to make cement and plaster. There is no connection between this word "lime" and the name for the green fruit. That "lime" comes from the same root as the Arabic word "laimun", which means both "lemon" and "lime."