# gein

> English word · Noun · frequency rank #91,557

## Definitions
1. Humic acid.

## Etymology
Borrowed from German Geïn, coined by Jöns Jacob Berzelius in 1832, from Ancient Greek γήινος (gḗinos, “of earth”), from γῆ (gê, “earth”).

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