Which part of the Roman house was specifically designated as the dining room?

The dining room in a Roman house is known as the Triclinium. This area was specifically designed for dining and typically featured a U-shaped arrangement of couches where guests would recline while eating. This style of dining was reflective of Roman customs and social practices, allowing for a more relaxed and communal eating experience. The term "triclinium" itself derives from the Greek words meaning three (tri) and couches (klinai), emphasizing the layout of the seating arrangement.

In contrast, the other options refer to different parts of a Roman house. The Impluvium is the sunken part of the atrium that collected rainwater, the Atrium served as the central hall of the house and a place for receiving guests, while the Tablinum, found at the back of the atrium, typically served as an office or study for the head of the household. Each of these areas had distinct functions separate from that of dining, further highlighting the importance of the Triclinium as the specific room designated for meals.