[n] coil such that current is induced in it by passing a current through the primary coil
[n] the defensive football players who line up behind the linemen
[adj] belonging to a lower class or rank
[adj] not of major importance; "played a secondary role in world events"
[adj] of second rank or importance or value; not direct or immediate; "the stone will be hauled to a secondary crusher"; "a secondary source"; "a secondary issue"; "secondary streams"
[adj] depending on or incidental to what is original or primary; "a secondary infection"
[adj] inferior in rank or status; "the junior faculty"; "a lowly corporal"; "petty officialdom"; "a subordinate functionary"
alternate, alternative, auxiliary, collateral, incident, incidental, indirect, inferior, junior, junior-grade, lower, lower-ranking, low-level, lowly, minor, petty(a), secondary coil, secondary winding, secondhand, second-string, standby, subaltern, subor