Definitions
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun Plural form of
helioscope .
Etymologies
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Examples
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"very little of a mathematician" although he wrote on the motion of the earth (1674), on helioscopes and other instruments (1675), on the rotation of Jupiter (1666), and on barometers and sails.
A Budget of Paradoxes, Volume I (of II) Augustus De Morgan 1838
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