There is no widely recognized common name for "dam2 square". It's likely a term used in a specific context or field.

To help me understand and give you a more accurate answer, could you please provide:

* Context: What is the subject matter or field where you encountered this term?

* Definition: What does "dam2 square" mean in that context?

For example, is it related to:

* Engineering: Dam dimensions or water flow calculations?

* Science: Units of measurement or a specific formula?

* Other fields: Is it a code, abbreviation, or part of a technical term?

With more information, I can help you find the common name or equivalent.