right atrium (noun)

1. During the prayer service, the priest mentioned the significance of the right atrium as a symbol of the heart's devotion to God.

2. In the anime series, the protagonist's power came from a mysterious crystal located in their right atrium.

3. In the futuristic world depicted in the science fiction novel, humans were genetically modified to have additional right atriums to enhance their circulatory system.

4. As the horror movie unfolded, the evil spirit possessed the character through their right atrium, causing their heart to beat with malevolent force.