# capsid

> English word · Noun · IPA /ˈkæp.sɪd/ · frequency rank #72,166

## Definitions
1. The outer protein shell of a virus.

## Etymology
From French capside.

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