Pullback
A pullback is a temporary move against the trend, or back to a level price has just broken, before the main move resumes.
The word covers two related things. In a trend, it is a retracement: in a rally, price drops back to a moving average, support or a Fibonacci level before moving on. After a breakout, it is the retest of the broken level, which switches role.
Entering on a pullback rather than on the impulse allows a tighter stop and a better risk-reward ratio. The trade-off: some strong moves never come back, and you can miss the train.
The hard part is telling a pullback from a real reversal. Structure helps: as long as the last significant low holds in a rally, the dip is still a pullback.