trifocal Syllabification: (tri·fo·cal)Pronunciation: /ˈtrīˌfōkəl/Definition of trifocal adjective (of a pair of glasses) having lenses with three parts with different focal lengths. noun (trifocals) a pair of glasses with trifocal lenses. trifocal in other Oxford dictionaries Definition of trifocal in the British & World English dictionary
