You are correct!
From our dictionary:
in me•di•as res
(in me'di-äs" res'; Eng. in mē'dē-us" rēz', in mā'dē-äs" rās'), —Latin.
in the middle of things.
(in me'di-äs" res'; Eng. in mē'dē-us" rēz', in mā'dē-äs" rās'), —Latin.
in the middle of things.
