اذا لم تجد ما تبحث عنه يمكنك استخدام كلمات أكثر دقة.
الَّرَقَم الذَّرِّي 33:- a very poisonous metallic element that has three allotropic forms; arsenic and arsenic compounds are used as herbicides and insecticides and various alloys; found in arsenopyrite and orpiment and realgar (Arabic WordNet)