toxocariasis Syllabification: (tox·o·car·i·a·sis)Pronunciation: /ˌtäksəkəˈrīəsis/Definition of toxocariasis noun infection of a human with the larvae of toxocara worms, causing illness and a risk of blindness from cyst formation in the eye. toxocariasis in other Oxford dictionaries Definition of toxocariasis in the British & World English dictionary