Multiple choice general knowledge science & technology Expand CERN. European Organization for Nuetron Research European Organization for Natural Research European Organization for Nuclear Research European Organization for Nuclear particle Research Reveal answer Fill a bubble to check yourself C Correct answer Explanation CERN stands for European Organization for Nuclear Research. This is the correct expansion of the acronym. The options with 'Nuetron', 'Natural', and 'Nuclear particle' are incorrect spellings or additions.