wasium

Century Dictionary and Cyclopedia

1. n. A supposed new chemical element announced in 1862 by Bahr as present in a Swedish mineral resembling orthite. Its supposed oxid was probably thoria, though it may have been a mixture of earths of the yttria and ceria groups.

Wiktionary

1. n. chemistry, archaic A supposed chemical element extracted from wasite, later identified as thorium.

GNU Webster's 1913

1. n. (Chem.) A rare element supposed by Bahr to have been extracted from wasite, but now identified with thorium.