Paschen series

[ pah-shuhn ]
/ ˈpɑ ʃən /

noun Physics.

a series of lines in the infrared spectrum of hydrogen.

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Origin of Paschen series

First recorded in 1920–25; see origin at Paschen-Back effect
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020