Certified Paraoptometric (CPO) Practice Exam 2025

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What does the prefix "Bi-" signify in medical terminology?

  1. One

  2. Two

  3. Three

  4. Four

The correct answer is: Two

The prefix "Bi-" in medical terminology signifies the concept of "two." It is commonly used in various terms to denote pairs or dual aspects. For example, in the term "bicycle," it refers to two wheels, and in medical terms like "bicuspid," it indicates a tooth with two cusps. This prefix is integral in differentiating conditions, treatments, or anatomical structures that involve two distinct components or functions, making it a pivotal element in the understanding of medical vocabulary.