Definitions
from The Century Dictionary.
- noun An instrument designed to measure the relation, brightness, or apparent magnitude of the stars.
from the GNU version of the Collaborative International Dictionary of English.
- noun An instrument for comparing the relative amount of the light of stars.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun An
instrument designed to measure the brightness,relation , or apparentmagnitude of stars.
Etymologies
from Wiktionary, Creative Commons Attribution/Share-Alike License
astro- + -meter
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Examples
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"astrometer" in which an "artificial star," formed by the total reflection of moonlight from the base of a prism, served as a standard of comparison, he was able to estimate the lustre of the _natural_ stars examined by the distances at which the artificial object appeared equal respectively to each.
A Popular History of Astronomy During the Nineteenth Century Fourth Edition 1874
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