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luminosity class

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noun Astronomy.

a classification of stars of a given spectral type according to their luminosity, breaking them down into dwarfs, giants, and supergiants.

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On the farm, the feed for chicks is significantly different from the roosters’; ______ not even comparable.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021
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