# microtoroid

> English word · Noun

## Definitions
1. Any of an array of small ring-shaped structures, normally on the surface of a semiconductor substrate, that function as resonators in photonic devices.

## Etymology
From micro- + toroid.

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