sand clock definition

  • clock_1 noun - Definition, pictures, pronunciation and ...

    Definition of clock_1 noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more. We use cookies to enhance your experience on our website, including to provide targeted advertising and track usage.

  • Hourglass | Encyclopedia

    The hourglass or sand clock follows exactly the same principle as the clepsydra. Two globes (also called phials or ampules) of glass are connected by a narrow throat so that sand (with relatively uniform grain size) flows from the upper globe to the lower.

  • Sand Clock | Activity | Education

    Mar 20, 2009 · An hour glass, or a sand clock, is a device that measures the passing of time. It consists of two bulbs that are connected by a narrow segment. The hour glass is used to measure how long it takes for the sand inside to pass from one of the bulbs to the other.