# oxidaniumyl

> English word · Noun

## Definitions
1. The cation H₂O⁺, present in interstellar space, formed by removal of an electron from a water molecule

## Etymology
From oxidanium + -yl.

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