secondary - noun

the defensive football players who line up behind the linemen

coil such that current is induced in it by passing a current through the primary coil

secondary - adjective

• being of second rank or importance or value; not direct or immediate
• inferior in rank or status
• depending on or incidental to what is original or primary
• not of major importance
• belonging to a lower class or rank

secondary - thesaurus

lowly   petty   subaltern