alulan. 小翼羽翅瓣學術名詞小翼羽：動物學、實驗動物及比較醫學阿路拉：外國地名翅瓣：實驗動物及比較醫學英文釋義scalelike structure between the base of the wing and the halter of a two-winged flytuft of small stiff feathers on the first digit of a bird's wing