virgan. [氣]雨幡學術名詞雨旛：地球科學、航空太空、氣象學、機械工程、海事旛狀〔雲〕：地球科學陰莖：動物學雪旛：氣象學旛狀[雲]：海事英文釋義light wispy precipitation that evaporates before it reaches the ground (especially when the lower air is low in humidity)