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heartworm

[hahrt-wurm] /ˈhɑrtˌwɜrm/
noun
1.
a parasitic nematode, Dirofilaria immitis, transmitted by mosquito and invading the heart and pulmonary arteries of dogs, wolves, and foxes throughout its range in tropical, subtropical and, more recently, temperate regions around the world.
2.
the disease caused by infection with heartworm.
Origin
1885-1890
1885-90; heart + worm
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for heart worm

heartworm

/ˈhɑːtˌwɜːm/
noun
1.
a parasitic nematode worm, Dirofilaria immitis, that lives in the heart and bloodstream of vertebrates
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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