# Pfund series

> English word · Proper noun

## Definitions
1. One of the hydrogen spectral series.

## Etymology
Experimentally discovered in 1924 by August Herman Pfund.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/pfund-series