# siderism

> English word · Noun

## Definitions
1. A former system of natural philosophy that posited relationships of inorganic phenomena to organic phenomena and studied pendulums, magnets, and dowsing rods; developed by Johann Wilhelm Ritter (1776–1810) and others.

## Etymology
From sidero- (“star-related”) + -ism.

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