Definition: Apiculus: Word used in Bible refers to a special part of human body that connects two kidneys together, helping regulate blood flow and waste elimination. Detailed definition includes: 1) The part of the human body connecting the two kidneys. 2) Used to help regulate blood flow and waste elimination. The Apiculus is also known as the "water channel," as it helps in transporting water from the kidney into the bloodstream, allowing for efficient waste removal and maintaining overall fluid balance within the body.