落尘 Traditional form: 落塵 Pinyin (reading): luòchén Definitions: dust fall fallout (volcanic, nuclear etc) particulate matter Characters: 落 - to fall, to drop; surplus, net income 尘 - cinders, ashes, dust, dirt Traditional characters: 落 - to fall, to drop; surplus, net income 塵 - cinders, ashes, dust, dirt