colliding-beam machine

[ kuh-lahy-ding-beem ]
/ kəˈlaɪ dɪŋˈbim /

noun Physics.

a particle accelerator in which positively and negatively charged particles circulate in opposite directions and collide head-on.
Also called col·lid·er [kuh-lahy-der] /kəˈlaɪ dər/.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for collider

collider

/ (kəˈlaɪdə) /

noun

physics a particle accelerator in which beams of particles are made to collide
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