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The use of the clepsydra, or water clock, was adopted by the Romans primarily from the Greeks. The clepsydra utilizes the flow of water to measure time, a concept that the Greeks refined and popularized in their own society. Greek innovations in various timekeeping instruments laid the groundwork for later developments by the Romans.

While other civilizations, such as the Egyptians, also had timekeeping systems, the specific design and function of the clepsydra as used by the Romans were heavily influenced by Greek advancements. The Romans incorporated this technology into their daily lives and public ceremonies. Understanding this relationship highlights the flow of cultural knowledge and technology between civilizations and illustrates how the Romans were able to enhance and adapt existing ideas from the Greeks for their own use.