What does the prefix depo stand for?

The prefix "depo" is actually a shortened form of "depot", which means "a place where something is stored".

This prefix is commonly used in medical terms, such as:

* Depo-Provera: A long-acting injectable contraceptive that is stored and released slowly in the body.

* Depo-Medrol: A long-acting injectable corticosteroid that is stored and released slowly in the body.

Therefore, "depo" in these contexts refers to the depot effect – the slow release of a substance from a storage site.