The Collaborative International Dictionary
Plucker tube
Geissler tube \Geis"sler tube`\ (Elec.) A glass tube provided with platinum electrodes, and containing some gas under very low tension, which becomes luminous when an electrical discharge is passed through it; -- so called from the name of a noted maker in germany. It is called also Pl["u]cker tube, from the German physicist who devised it.
Plucker tube
Plucker tube \Pl["u]ck"er tube\ [So named after Julius Pl["u]cker, a German physicist.] (Physics)
A vacuum tube, used in spectrum analysis, in which the part through which the discharge takes place is a capillary tube, thus producing intense incandescence of the contained gases.
Crookes tube.