Definition of rhabdophane in US English:

rhabdophane

noun

Mineralogy
  • A phosphate mineral containing rare earth elements, typically occurring as small white prisms or as botryoidal masses or encrustations.

Origin

Late 19th century; earliest use found in Journal of the Chemical Society. Recorded earlier as French rhabdophane: so called in reference to the characteristic absorption bands in the spectrum by which the mineral was identified.