Glaser gla·ser US/ˈɡleɪzɜr/ rare noun 1. United States physicist who invented the bubble chamber to study subatomic particles (born in 1926) SynonymsDonald GlaserDonald Arthur Glaser Related words Broader terms nuclear physicist WordNet 2.1 (Princeton University). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved.