Geiger counter

device for detecting and measuring radioactivity 盖革计数器（探测放射能量的仪器）.

gazetteer, gazump, gazumper, gazumping, GB, GC, GCE, GCSE, Gdn, GDP, GDR, gear, gear-change, gearbox, gearwheel, gecko, gee, gee-gee, geese, geezer, geisha, gel, gelatine, gelatinous, geld, gelding, gelignite, gem, Geminean, Gemini, gemstone, gen, gendarme, gendarmerie, gender, gene, genealogical, genealogically, genealogist, genealogy,