pliotronn.
/ˈplʌɪə(ʊ)trɒn/, /ˈplʌɪə(ʊ)tr(ə)n/, U.S. /ˈplaɪəˌtrɑn/ Electronics. Now rare.
A high-vacuum thermionic valve with one or more grids between the electrodes.
ΘΚΠ
the world > matter > physics > electromagnetic radiation > electronics > electronic devices or components > thermionic valve > [noun] > vacuum tube or thermionic valve
vacuum tube1859
trigger tube1894
audion1906
pliotron1915
diode1919
electron tube1919
negatron1919
pentode1919
power valve1919
tetrode1919
triode valve1919
magnetron1921
bright emitter1923
peanut valve1923
peanut1924
power tube1924
multiple valve1929
thyratron1929
heptode1932
hexode1933
pentagrid1933
acorn tube1934
octode1934
triode-pentode1936
triode-hexode1937
transitron1939
trochotron1947
steering diode1957
1915 I. Langmuir in Electrician 21 May 242/2 The term ‘Pliotron’ has been adopted to designate a Kenotron, in which a third electrode has been added for the purpose of controlling the current flowing between the anode and the cathode.
1918 Wireless World July 230 The characteristics of the pliotron depend upon the length of filament used.
1962 D. Glick Quantitative Chem. Techniques v. 327 The outer jacket is filled with 0.1 N hydrochloric acid. Pickford used a Pliotron tube amplifier with the apparatus.
1971 G. M. Chute & R. D. Chute Electronics in Industry (ed. 4) x. 167 A third element, called the grid, is placed between the anode and cathode to form a high-vacuum type of triode (also called the pliotron).
This entry has been updated (OED Third Edition, September 2006; most recently modified version published online March 2022).
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n.1915