1831 T. Thomson Chem. (ed. 7) II. 249Seleniocyanogen..was discovered by Berzelius. 
1836 Brande Chem. (ed. 4) 570Seleniocyanuret of Potassium. 
[ 1848Ibid. (ed. 6) I. 602Seleniocyanide. ] 
1853 Watts tr. Gmelin'sHand-bk. Chem. VIII. 122Selenocyanide of lead. 
Ibid. ,Selenocyanide of Ammonium. 
1868 ― Dict. Chem. V. 219Seleniocyanates. 
Ibid. ,Seleniocyanic Acid. 
selenio-
Prefix
- chemistry selenium