| SEC | used of the second year in United States high school or college |
|---|---|
| SEC | of secondary import |
| SEC | coil such that current is induced in it by passing a current through the primary coil |
| SEC | the defensive football players who line up behind the linemen |
| SEC | belonging to a lower class or rank |
| SEC | not of major importance |
| SEC | of second rank or importance or value |
| SEC | depending on or incidental to what is original or primary |
| SEC | inferior in rank or status |
| SEC | cessation of menstruation in a woman who had previously menstruated |
| SEC | a cell that can be recharged |
| SEC | armed forces censorship of the personal communications of officers or civilian employees or enlisted personnel not subject to primary censorship |