say it: kuh-LAHY-dur
collider is a noun meaning "an accelerator in which two beams of particles are forced to collide head on". It carries one recorded sense.
an accelerator in which two beams of particles are forced to collide head on
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for collider come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.