Definition of plumbane in US English:

plumbane

noun

Chemistry
  • Lead tetrahydride, PbH₄, an extremely unstable gas; (more generally) any of a (largely hypothetical) series of lead hydrides, analogous to the alkanes, of which PbH₄ is the simplest member.

Origin

Early 19th century (in an earlier sense). From classical Latin plumbum lead + -ane.

Pronunciation

plumbane

/ˈplʌmbeɪn/