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Learn how to say this word: 'Dioptra'
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This is the definition of "Dioptra":
n. An optical instrument, invented by Hipparchus, for taking
altitudes, leveling, etc.
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This is the definition of "Dioptra":
n. An optical instrument, invented by Hipparchus, for taking
altitudes, leveling, etc.
********************
********************
Make sure to follow us also here and here and here!
********************
If you like this videos, please consider donating Bitcoins to 1L2ZNnYmVj8fhUX5xitdbdUF5GQkSCQkPw
********************
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