# heterocyclic

> English word · Adjective · frequency rank #72,385

## Definitions
1. Having atoms of two or more different elements in at least one of its rings.
2. Having one or more atoms other than carbon in at least one of its rings.

## Etymology
From hetero- + cyclic.

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