Home › Words › L › leaditeleaditeleadite means A joint-sealing compound made from iron, sulfur, etc., that was used instead of lead-containing compounds.EtymologyFrom lead + -ite, a former trademark.nounA joint-sealing compound made from iron, sulfur, etc., that was used instead of lead-containing compounds.Definitions & examples from Wiktionary (CC BY-SA 3.0).