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abnormal enlargement of the air sacs in the lungs
a tiny sac for holding air in the lungs; formed by the terminal dilation of tiny air passageways
a tiny sac for holding air in the lungs; formed by the terminal dilation of tiny air passageways
a tiny sac for holding air in the lungs; formed by the terminal dilation of tiny air passageways
a tiny sac for holding air in the lungs; formed by the terminal dilation of tiny air passageways