Dictionary
book lung
noun
Definition of BOOK LUNG
: a saccular breathing organ in many arachnids containing thin folds of membrane arranged like the leaves of a book
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First Known Use of BOOK LUNG
1897
Medical Dictionary
book lung
noun \ˈbu̇k-\
Medical Definition of BOOK LUNG
: a saccular breathing organ in many arachnids containing thin folds of membrane arranged like the leaves of a book
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