Selenium - Definition - Law Dictionary Home Dictionary Definition selenium

Definition :

A nonmetallic element of the sulphur group of atomic number 34 analogous to sulphur in its compounds It is found in small quantities with sulphur and some sulphur ores and obtained in the free state as a dark reddish powder or crystalline mass or as a dark metallic looking substance It exhibits under the action of light a remarkable variation in electric conductivity and is used in certain electric apparatus Symbol Se Atomic weight 7896