varix Syllabification: (var·ix)Pronunciation: /ˈve(ə)riks/Definition of varix noun (plural varices /ˈve(ə)riəˌsēz/) 1 Medicine a varicose vein. 2 Zoology each of the ridges on the shell of a gastropod mollusk, marking a former position of the aperture. Origin: late Middle English: from Latinvarix in other Oxford dictionaries Definition of varix in the British & World English dictionary