# nucleobase

> English word · Noun

## Definitions
1. The base of a nucleic acid, such as thymine, uracil, adenine, cytosine and guanine.

## Etymology
From nucleo- + base.

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