Definition: The word "alkaline" comes from the Greek word "alkalinus," meaning "thin, soft, or smooth." It refers to something that feels very soft to the touch, like a lotion or soap. In the Bible, the term "alkali" is used in reference to substances such as salt, which are considered very soft and easily absorbed into the skin. In other words, these substances can be applied directly to the skin without causing harm. So, if you were to define "alkaline," it would mean something that feels very soft on contact with the skin or allows for easy absorption into the skin.