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).

Origin of -tron

by initial shortening of electron, with perhaps accidental allusion to the Gk instrumental suffix -tron, as in árotron plough
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British Dictionary definitions for -tron


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