Definition of pliotron in English:

pliotron

Pronunciation /ˈplʌɪə(ʊ)trɒn/ /ˈplʌɪə(ʊ)tr(ə)n/

noun

rare Electronics
  • A high-vacuum thermionic valve with one or more grids between the electrodes.

Origin

Early 20th century. From plio- + -tron.