toxocara Syllabification: (tox·o·car·a)Pronunciation: /ˌtäksəˈkarə/Definition of toxocara noun a parasitic nematode worm, especially a common worm of dogs or cats that is transmissible to humans. Genus Toxocara, class Phasmida, in particular T. canis (in dogs) and T. cati (in cats) Origin:modern Latin, from toxo-(see toxi-) + Greek kara 'head'toxocara in other Oxford dictionaries Definition of toxocara in the British & World English dictionary