# ichthyophthiriasis

> English word · Noun

## Definitions
1. A parasitic infection of freshwater fish caused by the ciliate Ichthyophthirius multifiliis.

## Etymology
From Ichthyophthirius + -iasis, from Ancient Greek ἰχθύς (ikhthús, “fish”) + Ancient Greek φθείρ (phtheír, “louse”) + -ius.

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