T0085100 (tə-wĕl′chē, tā-wĕl′chā)n.pl.Tehuelche or Te·huel·ches1. A member of a South American Indian people formerly inhabiting most of Patagonia, with a small present-day population in southern Argentina.2. The language of the Tehuelche.Te·huel′che·an(-chē-ən) adj.