What does the prefix "peri-" mean in medical terminology?

The prefix "peri-" in medical terminology signifies "around" or "surrounding." This prefix is commonly used in various medical terms to describe conditions, structures, or locations that are encircling something else. For example, "pericardium" refers to the fibrous sac surrounding the heart, and "peripheral" pertains to locations that are situated at or near the surface or outer limits of an area, particularly concerning nerves or blood vessels. Understanding the meanings of prefixes like "peri-" is essential in medical terminology as it helps healthcare professionals accurately identify and describe the anatomical relationships and medical conditions.