No, the term "hydragyrum" is not an original name for liquid metal. It is the Latin word for mercury, which is the only metal that is liquid at room temperature.

Here's why it's not a general term for liquid metals:

* Specificity: "Hydragyrum" refers specifically to mercury, not to all liquid metals.

* Etymology: The word "hydragyrum" comes from the Greek words "hydor" (water) and "argyros" (silver), reflecting the silvery appearance and fluidity of mercury.

* Historical Use: The term "hydragyrum" was primarily used by alchemists and early scientists to refer to mercury. It is not a common term today, with "mercury" being the preferred name.

While "hydragyrum" is an interesting historical term, it's not a general term for any liquid metal.