Circuit - Group of exercises to be done together without resting unless specifically stated.
Compound Set - 2 exercises that work the same muscle group to both be done before resting.
Superset - 2 exercises that work opposite muscle groups to both be done before resting.
Giant Set - 3 or more exercises to both be performed before taking a break or resting.
Drop Set - Drop = after completing the initial number of reps, lower your weight and complete the next set of reps, then lower weight after that number of reps and complete the next set number of reps, and so on.
example: 8 drop 12 drop 12
example: 8 drop fail drop fail
Set to Failure - This means you will perform each set of the movement until muscle failure.
Descending Set (12,10,10,8) - Any time you see a descending set you should aim to increase weight each set when reps decrease.
Pyramid Set (12,10,10,12) - Any time you see a pyramid set you should aim to increase weight when reps decrease and lower weight as needed when reps increase.
Straight Set - Any time you see straight sets, regardless of the number of reps, they are going to be tempo based, so increasing weight each set isn't necessary.
21's / 30's - The first 7/10 reps will only be half reps beginning at the starting position to halfway contracted, the second 7/10 reps will begin at the halfway contracted position and go to full contraction, the last 7/10 reps will be full range of motion reps.