What it means
The beginning of words for something behind something else, or moving backward. The kidneys are retroperitoneal (behind the lining of the abdomen), retrograde means moving backward, and a retroverted uterus tips backward.
Related terms
ante-
A word beginning that means before, in time or in place.
peritone/o
A word root that means the peritoneum, the thin lining of the abdominal cavity.