Dictionnaires en ligne gratuits: Anglais, Espagnol, Français, Italien, Chinois, Allemand, Russe traductions, définitions, synonymes...
willemite  n a secondary mineral consisting of zinc silicate in hexagonal crystalline form. It is white, colourless, or coloured by impurities and is found in veins of zinc ore. Formula: Zn2SiO4 
 (C19: from Dutch willemit, named after Willem I of the Netherlands (1772--1834))