Zoology The respiratory organ of most aquatic animals that breathe water to obtain oxygen, consisting of a filamentous structure of vascular membranes across which dissolved gases are exchanged.

• 鳃：大多数水生动物吸取水中氧气的呼吸器官，是由单纤维结的脉管组织膜组成，通过它分解的气体来交换