"MELMED" is a derivative of the Hebrew name, "MELAMED". It refers to a teacher - either a tutor, or an elementary school teacher.
I have heard both good and bad things about melameds:
Bad: They are the lowest level of all teachers.
Good: Since they were the first teachers to interact with young children, they had a very important job to do: inculcate a love of education in their students' minds.
- Mark Melmed, Jan 2012