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Definition of heartworm

heartworm

/ˈhɑːrtˌwɜːrm/
heart · worm
Plural:heartworms
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heartworm Lexical Profile

heartworm Game Scores & Validity

• noun

1

A parasitic roundworm (Dirofilaria immitis) of the family Onchocercidae that is transmitted by mosquito bites and lodges in the right side of the heart and pulmonary arteries of dogs, cats, and other mammals.

Example

"The veterinarian prescribed a monthly chewable tablet to protect the puppy from heartworms."

2

A serious and potentially fatal veterinary condition caused by an infestation of parasitic roundworms in the heart and major blood vessels, leading to coughing, fatigue, and heart failure.

Example

"All shelter dogs are tested for heartworm before being cleared for adoption."

Synonyms
View all synonyms for heartworm

• Nearby Words

heartthrob
heartwarming
heartwarmingly
heartworm
hearty
heat
heat gun

Cite this Entry

Wordmom. (2026). Definition of Heartworm. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/heartworm
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