# tranquillityite

> English word · Noun

## Definitions
1. A hexagonal dark red mineral containing iron, oxygen, silicon, titanium, yttrium, and zirconium.

## Etymology
From tranquillity + -ite, after the Sea of Tranquillity, a basin on the Moon where the mineral was first found.

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