The "silver ratio" is a mathematical term used to describe a ratio between two numbers. It's also sometimes referred to as the "silver mean," the "silver section," or the "silver proportion." However, these terms are not widely used and the "silver ratio" remains the most common phrase to describe this ratio. The ratio is often associated with aesthetics and design, as it's been found to be present in many natural and man-made objects. It's also used in finance as a measure of investment return, and in science and engineering to describe the relationship between different physical properties.