book lung


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

First Known Use of BOOK LUNG

1897

book lung

noun \ˈbk-\   (Medical Dictionary)

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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