noun ·Rare ·Advanced level

Definitions

Noun

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

Etymology

From heart + worm.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.