lung

n. one of two saclike respiratory organs responsible for transferring oxygen into the bloodstream

For the village in Tibet, see Lung, TibetThe lung is the essential respiration organ in air-breathing vertebrates, the most primitive being the lungfish. Its principal function is to transport oxygen from the atmosphere into the bloodstream, and to excrete carbon dioxide from the bloodstream into the atmosphere. This exchange of gases is accomplished in the mosaic of specialized cells that form millions of tiny, exceptionally thin-walled air sacs called alveoli. The lungs also have non respiratory functions.
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(n.)
An organ for aerial respiration; -- commonly in the plural.
  

One of a pair of organs in the chest that supplies the body with oxygen, and removes carbon dioxide from the body.

[Chinese] A dragon in Chinese mythology. There are five types known: the celestial dragons who guard the abodes of the gods; dragon spirits, who rule over wind and rain but can also cause flooding; earth dragons, who cleanse the rivers and deepen the oceans; treasure guarding dragons; and the imperial dragons, who have five claws instead of the usual four. In Taoism, the dragon represents the yang principle and is often portrayed surrounded by water or clouds.