The term "compression balance" is not a standard term used to describe a physical quantity in engineering or physics. It's possible there might be some specialized use of this term within a specific field, but it's not widely recognized.

Here's why this might be confusing:

* Compression: This refers to the act of applying a force that reduces the volume of a material or object.

* Balance: This usually refers to a state of equilibrium where forces are equal and opposite, or a device used to measure weight.

To understand what you're looking for, it would be helpful to know the context in which you encountered "compression balance."

Here are some possible interpretations and related physical quantities:

* Engine Compression: In internal combustion engines, "compression ratio" is a key parameter describing the relationship between the volume of the cylinder at its largest and smallest points. This affects the engine's power and efficiency.

* Pressure: When compressing a material, you are increasing its pressure. Pressure is a force applied over a specific area.

* Stress and Strain: These are mechanical properties related to how materials respond to compression forces.

* Force: The fundamental quantity representing the interaction causing compression.

Please provide more context about where you encountered "compression balance" so I can give you a more precise answer.