air sac

英英字典

同义: air cell air sac alveolus
词性: n
解释: a tiny sac for holding air in the lungs; formed by the terminal dilation of tiny air passageways
示例: None

同义: air sac
词性: n
解释: any of the thin-walled extensions of the tracheae of insects
示例: None

同义: air sac
词性: n
解释: any of the membranous air-filled extensions of the lungs of birds
示例: None