vesbium, n. [NL., from L. Vesuvius, contr. Vesbius, Vesuvius.].
A rare metallic element of which little is known. It is said by Scacchi to have been extracted from a yellowish incrustation from the cracks of a Vesuvian lava erupted in 1631.
"It is not a recognized element. Actual identity?"
[1913 Webster]