Which term describes the belly?

The term that describes the belly is "ventr/o." In medical terminology, "ventr/o" is derived from the Latin word "venter," which means belly or abdomen. It is often used in various anatomical terms to indicate a position or direction related to the front or lower part of the body.

The other terms are related to different anatomical areas: "super/o" refers to superior or upper, indicating a position above. "Thorac/o" pertains to the thorax or chest, which is the area between the neck and the abdomen. "Umbillic/o" refers specifically to the umbilical region or navel area. Thus, "ventr/o" is the appropriate choice as it directly relates to the concept of the belly.