# notoph

> English word · Noun

## Definitions
1. A hypothetical particle with helicity properties complementary to those of a photon.

## Etymology
Phonetic reversal of photon; introduced in the 1960s by Ogievetskii and Polubarinov.

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