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Medical Definition of Filaroides
1. A genus of nematode parasites occurring in the lungs, bronchi, and trachea of dogs. Filaroides osleri is a small, widely distributed species that causes a chronic disease of dogs, manifested by small (usually less than 1 cm in diameter), gray-white or pink nodules; the most marked symptom is a harsh cough. (05 Mar 2000)