LavOEsium

La`vOE´si`um

n.

1.

(Chem.) A supposed new metallic element, which was said to have been discovered in pyrites, and some other minerals, and to be of a silver-white color, and malleable. It is not currently (1998) a recognized element.

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.