There isn't a general term called "tail" for a specific part of a cell. However, depending on the cell type and function, there are some structures that could be considered "tail-like":

* Flagella: These are long, whip-like structures that protrude from the cell surface. They are used for locomotion, like in sperm cells.

* Cilia: These are shorter and more numerous than flagella. They can also be used for movement, but they often function to move fluid or particles past the cell.

* Axon: This is the long, slender projection of a neuron (nerve cell) that carries nerve impulses away from the cell body. While not a "tail" in the literal sense, it acts as a transmission line extending from the neuron.

So, the specific term for the "tail" of a cell depends on what type of cell it is and what function that structure serves.