柯林斯詞典plumule /?plu?mju?l/ 1. N the embryonic shoot of seed-bearing plants 胚芽 返回 plumule劍橋詞典 plumule noun [C] (PLANT) the first shoot that grows from the seed of a plant 胚芽（從植物種子生長出來的第一個嫩芽） plumule noun [C] (BIRD) one of the small , soft feathers of a young bird 羢毛（幼鳥小而軟的羽毛） 返回 plumule