cloud chamber

(physics 物) device containing vapour in which the paths of charged particles, X-rays and gamma rays can be observed by the trail of tiny drops of condensed vapour they produce 云室（一种含饱和水蒸气的辐射探测器, 遇有粒子、 X射线和伽马射线通过时, 可形成凝结的细小水滴的径迹）.

closeness, closet, closing price, closing-time, closure, clot, cloth, clothe, clothes, clothes moth, clothes-basket, clothes-brush, clothes-hanger, clothes-horse, clothes-line, clothes-peg, clothing, clotted cream, cloture, cloud, cloud plains, cloud-bank, cloud-cuckoo-land, cloudburst, cloudiness, cloudless, clouds, cloudy, clout, clove, clove hitch, cloven, clover, clover-leaf, clown, clownish, cloy, cloying, cloze test, club,