Certified Paraoptometric (CPO) Practice Exam 2025

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What is the meaning of the suffix -meter?

Instrument used for examination
Someone who studies or practices
Measurer
Study of

The correct answer is: Measurer

The suffix -meter is derived from Greek and is commonly used to denote an instrument that measures something. It indicates a device specifically designed for quantifying certain parameters, such as temperature, distance, or pressure. Therefore, the correct interpretation of the suffix -meter is "measurer." For example, a thermometer measures temperature, and a barometer measures atmospheric pressure, both illustrating the function implied by the suffix. Other choices present different meanings that do not align with the definition of -meter. While an instrument used for examination could describe a broader category of devices, it doesn't capture the specific measuring aspect that -meter entails. Similarly, the idea of someone who studies or practices and the study of concepts pertain to other suffixes and prefixes, making them applicable in different contexts.