Selenium

sē-lē′ni-um, n. an element discovered by Berzelius in the refuse of a sulphuric-acid factory in 1817.— n. Sel′ēnate , a compound of selenic acid with a base.— adjs. Selen′ic , Selē′nious .— n. Sel′enide , a compound of selenium with one other element or radical—also Selē′niuret .— adjs. Selenif′erous ; Selē′niuretted , containing selenium. [Gr. sēlēne , the moon.]