Paschen series

[pah-shuh n] /ˈpɑ ʃən/

noun, Physics.

a series of lines in the infrared spectrum of hydrogen.

Origin of Paschen series

1920-1925

First recorded in 1920-25; See origin at Paschen-Back effect

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
Cite This Source

What Is the Difference Between Discreet and Discrete?
Learn the correct uses of these two commonly confused homophones.
What Character Was Removed from the Alphabet?
What mistaken pronunciation gave this character its name?
Apostrophes 101
This small mark has two primary uses: to signify possession or omitted letters.
How Do I Get a Word into the Dictionary?
People invent new words all the time, but which ones actually make it?

Few English speakers likely know this word

Scrabble Words With Friends

Heartbreak