principal quantum number

noun

: an integer associated with the energy of an atomic electron in any one of its possible stationary states and including both the azimuthal and the radial quantum number

called also total quantum number

Love words?

You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

• More than 250,000 words that aren't in our free dictionary
• Expanded definitions, etymologies, and usage notes
• Advanced search features
• Ad free!