Mediastinal lymphadenopathy or mediastinal adenopathy is an enlargement of the mediastinal lymph nodes.
the musical term for loud is F or forte and for soft P or piano.
When discussing textures like polyphony and homophony, the term is used to refer to a particular part (ie.  the first violin part is a much higher voice than that of the clarinet) Homophony can also mean more than two voices-- as long as one of them is dominant and has the melody, its homophony.