# heartworm

> English word · Noun · frequency rank #87,358

## Definitions
1. A parasitic organism that afflicts dogs, of species Dirofilaria immitis of roundworms.
2. (uncountable) The condition caused by this organism.

## Etymology
From heart + worm.

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