Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A filarial worm (Dirofilaria immitis) transmitted by mosquitoes and parasitic in the heart and associated blood vessels of dogs and other canids.
  • n. The condition resulting from infestation with the heartworm.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A parasitic organism that afflicts dogs.
  • n. The condition caused by this organism.

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