arsenic['α:s(ə)nɪk]
nounthe chemical element of atomic number 33, a brittle steel-grey semimetal with many highly poisonous compounds. (Symbol:As)
Derivatives
arsenicaladjective
Origin
ME (in sense 'orpiment'): via OFr. from L.arsenicum, from Gkarsenikon, from Arab.al-zarnīḵ.