"Cell soup" is not a commonly used scientific term. It's more of a colloquial or informal way to describe a mixture of cells.

Here are some possibilities for what you might be thinking of:

* Cell culture: This is a technique used to grow cells outside of their natural environment in a controlled setting. The cells are grown in a nutrient-rich solution called culture medium, which can be thought of as a "soup" for the cells.

* Tissue homogenate: This refers to a suspension of cells and other cellular components created by physically breaking up a tissue sample. This could be considered a "soup" in the sense that it's a mixture of different cellular elements.

* Embryonic development: In the early stages of embryonic development, the cells are loosely organized and appear like a "soup" of undifferentiated cells.

Without more context, it's difficult to say for sure what you're referring to. Could you please provide more details about where you encountered this term?