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a combining form extracted from electron, used with nouns or combining forms, principally in the names of electron tubes (ignitron; klystron; magnetron) and of devices for accelerating subatomic particles (cosmotron; cyclotron); also, more generally, in the names of any kind of chamber or apparatus used in experiments (biotron).



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“Was” is used for the indicative past tense of “to be,” and “were” is only used for the subjunctive past tense.

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Origin of -tron

By initial shortening of electron, with perhaps accidental allusion to the Greek instrumental suffix -tron, as in árotron “plough”
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

Example sentences from the Web for -tron

British Dictionary definitions for -tron (1 of 2)

/ (trɒn) /


a public weighing machine
the place where a tron is set up; marketplace

Word Origin for tron

C15: from Old French trone, from Latin trutina, from Greek trutanē balance, set of scales

British Dictionary definitions for -tron (2 of 2)


suffix forming nouns

indicating a vacuum tubemagnetron
indicating an instrument for accelerating atomic or subatomic particlessynchrotron

Word Origin for -tron

from Greek, suffix indicating instrument
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012