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book lung. In DICTIOUS you will not only get to know all the dictionary meanings for the word
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English
Noun
book lung (plural book lungs)
- (arachnology) A lamellate respiratory organ found in arachnids.
1996, Michael J. Roberts, Spiders of Britain and Northern Europe, page 16:In addition to book lungs most spiders also have a second respiratory system in the form of paired tracheae; Atypus has none.
Translations
A lamellate respiratory organ found in arachnids