There is no single scientific name for trenches. "Trench" is a general term used in various fields, each with its own specific definition.

Here are some examples:

Geology:

* Oceanic Trench: These are deep depressions in the ocean floor formed at convergent plate boundaries. They don't have a specific scientific name beyond "trench."

* Tectonic Trench: This term may be used to refer to trenches formed by tectonic processes, which could include both oceanic and continental trenches.

Military:

* Trench Warfare: This refers to a style of combat in which opposing armies occupy and fight from trenches. There is no specific scientific name for this.

Other:

* Drainage Trench: These are trenches dug to collect and drain water. They are not a scientific term, but a practical one.

If you can provide more context about the specific type of trench you are interested in, I can provide a more accurate answer.