If a player bets in an earlier round and then bets again in the current one, this is called a continuation bet since it continues the aggression from the previous round. A typical continuation bet situation is when a player raises in the first round and is called by another player and then bets again after the flop, often as a bluff when having nothing at all.
Delayed Continuation Bet
A delayed continuation bet is one that is not made directly in the next round but rather two rounds from the original bet. For instance, if a player raises pre-flop in Texas Hold'em, does not bet after the flop but bets after the turn, it is known as a delayed continuation bet.