book lung

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book lung

n.
One of the paired saccular respiratory organs found in some arachnids, such as scorpions and spiders, consisting of several parallel membranous folds arranged like the pages in a book.

book′ lung`


n.
the respiratory organ of many arachnids, composed of thin, paperlike layers of tissue.
[1895–1900]

book lung

(bo͝ok)
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.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.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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References in periodicals archive ?
A scorpion exuvium may include the booklung lamellae, preoral tube, and other internal features and there may be little distortion of delicate hairs, bristles, and setae (Gaban & Farley 2002).
In the booklungs, the larva molts again, attaches itself to a booklung, and enters a resting stage.