Final answer:
The broad ligament is the structure that suspends the uterus laterally, supporting it by attaching to both sides of the uterus and the pelvic wall.
Step-by-step explanation:
The ligament that suspends the uterus laterally is known as the broad ligament. It is a fold of peritoneum that extends from the sides of the uterus to the pelvic wall.
This ligament plays a primary role in supporting and maintaining the position of the uterus within the abdominopelvic cavity.
The broad ligament should not be confused with the round ligament, which also attaches to the uterus but extends to the labia majora;
nor with the uterosacral ligament that provides posterior support by extending from the cervix to the sacrum; nor with the ovarian ligament which connects the ovary to the uterus.