# noosphere

> English word · Noun · IPA /ˈnəʊ.əsfɪə/

## Definitions
1. The sphere of human reason, thought, and consciousness, seen as a theoretical evolutionary stage.

## Etymology
Borrowed from French noosphère, from Ancient Greek νόος (nóos, “mind, spirit”) + Ancient Greek σφαῖρα (sphaîra, “ball, globe”), developed and perhaps coined by Pierre Teilhard de Chardin and Vladimir Vernadsky, in analogy to atmosphere, biosphere etc. By surface analysis, nous (“mind”) + -sphere.

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