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lung
The definition of a lung is a sponge like organ used for breathing that is found in the chest cavity in humans and animals.
(noun)An example of a lung is the organ that puts oxygen in the blood and removes carbon dioxide.
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See lung in Webster's New World College Dictionary
noun
- either of the two spongelike respiratory organs in the thorax of vertebrates, that oxygenate the blood and remove carbon dioxide from it
- any analogous organ in invertebrates
Origin: ME lunge < OE lungen, akin to Ger lunge < IE base *legwh-, light in weight and movement: the lungs were so named because of their lightness: see lights
See lung in American Heritage Dictionary 4
noun
- Either of two spongy, saclike respiratory organs in most vertebrates, occupying the chest cavity together with the heart and functioning to remove carbon dioxide from the blood and provide it with oxygen.
- A similar organ in some invertebrates, including spiders and terrestrial snails.
Origin:
Origin: Middle English lunge
Origin: , from Old English lungen, lungs; see legwh- in Indo-European roots
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