# tonofilament

> English word · Noun

## Definitions
1. A structural filament of keratin present in the cytoplasm

## Etymology
From tono- + filament.

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