What is the medical term meaning on?

Answer 1

As in general use, @ is often used for "at" in medical contexts.

Answer 2

It is hard to know what you are asking:

Mean can be the middle or average, medical can mean pertaining to the science of medicine or it can mean pertaining to medication.

Answer 3

"Supra-" is the medical terminology combining form meaning upon.

Answer 4

In medical terms, with is often written as a lower case "c" with a horizontal line over it.