| book lung n. A saccular respiratory organ found in some arachnids, such as scorpions and spiders, consisting of several parallel membranous folds arranged like the pages in a book. |
book lung (b k) The breathing organ of scorpions, spiders, and some other arachnids. It consists of membranes arranged in several parallel folds like the pages of a book. |
ThesaurusLegend: Synonyms Related Words Antonyms
| Noun | 1. | book lung - organ in many arachnids containing many thin folds of membrane resembling the leaves of a book respiratory organ - any organ involved in the process of respiration |
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