Certified Paraoptometric (CPO) Practice Exam 2025

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What does the prefix "Sub-" indicate?

  1. Under, below

  2. Away from

  3. Beyond

  4. Cutting out

The correct answer is: Under, below

The prefix "Sub-" signifies the meaning "under" or "below." This prefix is commonly used in medical terminology and other fields to describe something that is beneath or lower in position relative to something else. For example, in the term "subcutaneous," it refers to something located under the skin. Understanding this prefix is essential, as it provides clarity in various contexts, particularly in anatomy and physiology. The other choices represent different prefixes that convey distinct meanings, but none align with the clear definition of "Sub-."

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