The Airbus A330 was the first all-new twin-engine wide-body Airbus to enter service after the A300.
Airbus developed the A330 alongside the four-engine A340 during the late 1980s. Both aircraft shared a common fuselage cross-section, cockpit philosophy and wing development, but the A330 used two engines while the A340 used four.
The A330 first flew in 1992 and entered commercial service in 1994 with Air Inter. Its combination of long range, high capacity and twin-engine efficiency made it one of the most widely used wide-body aircraft in the world.
The A310 was a derivative of the A300, so it is not an entirely new post-A300 wide-body design in the same sense. The A350 came later and introduced a newer composite-focused architecture. The A330’s success also led to freighter, tanker and military derivatives.