Weichsel Syllabification: (Weich·sel)Pronunciation: /ˈvīksəl/Definition of Weichsel noun [usually as modifier] Geology the final Pleistocene glaciation in northern Europe. the system of deposits laid down at the time of the Weichsel glaciation. Derivatives WeichselianPronunciation: /vīkˈsilēən/ adjective & noun Origin: 1930s: from the German name of the Vistula River in PolandWeichsel in other Oxford dictionaries Definition of Weichsel in the British & World English dictionary