bright-line

brightline

[brahyt-lahyn]
adjective
1.
(of rules, standards, etc.) unambiguously clear: This muddies the waters of what should be a brightline rule.
noun
2.
Physical Chemistry, brightline spectrum.
Also, bright-line.


Origin:
bright + line1

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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Dictionary.com's 21st Century Lexicon
Main Entry:  bright-line
Part of Speech:  n
Definition:  in physics, a discontinuous spectrum consisting of bright lines resulting from radiation from an incandescent vapor or gas;
Example:  If the gas is made incandescent by heat or an electric discharge, the resulting spectrum is a bright-line, or emission, spectrum, consisting of a series of bright lines against a dark background.
Dictionary.com's 21st Century Lexicon
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