Definitions
from The Century Dictionary.
- noun The spectrum of bright lines or luminous arcs seen or photographed during a total eclipse of the sun at the beginning and end of the total obscuration. It lasts for a few seconds only.
Etymologies
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Examples
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The flash-spectrum, in its successive phases, appeared on plates taken by Sir Norman Lockyer, Mr. Evershed,
A Popular History of Astronomy During the Nineteenth Century Fourth Edition 1874
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