Word.ws English Dictionary

heartworm

heartworm noun: a parasitic organism that afflicts dogs, of species Dirofilaria immitis of roundworms.

Noun

heartworm (countable and uncountable, plural heartworms)

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

Forms of heartworm

pluralheartworms

Origin of heartworm

From heart + worm.

Questions about heartworm

What does heartworm mean?
Heartworm means a parasitic organism that afflicts dogs, of species Dirofilaria immitis of roundworms.
What part of speech is heartworm?
Heartworm is a noun.
What is the plural of heartworm?
The plural of heartworm is heartworms.

Words near heartworm in the dictionary

  1. heartwater
  2. heartwhole
  3. heartwise
  4. heartwood
  5. heartwoods
  6. heartworm
  7. heartworms
  8. heartworthy
  9. heartwrenching
  10. heartwrenchingly
  11. hearty

Source and license

Adapted from Wiktionary: heartworm (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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Pronunciation audio from Wikimedia Commons, each file under its own free license: en-us-heartworm.ogg.

Cite this entry: “heartworm.” Word.ws, https://word.ws/heartworm. Based on Wiktionary, CC BY-SA 4.0.