hourglasses in English
noun
1
an invertible device with two connected glass bulbs containing sand that takes an hour to pass from the upper to the lower bulb.
The invention of timekeeping devices - hourglasses , water clocks, graduated tapers - made it possible for early civilized people to begin to control and standardize the units of time, and in doing so to coordinate their lives.
Use "hourglasses" in a sentence
Below are sample sentences containing the word "hourglasses" from the English Dictionary. We can refer to these sentence patterns for sentences in case of finding sample sentences with the word "hourglasses", or refer to the context using the word "hourglasses" in the English Dictionary.
1. While some early hourglasses actually did use sand as the granular mixture to measure time, many did not use sand at all.