Etymology: < modern Latin dipneumonus ( < Greek δι-, δίς twice + πνεύμων lung) + -oussuffix.
Zoology.
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Having two lungs or respiratory organs; said of the Dipneumona or two-lunged fishes, and of the Dipneumones or two-lunged spiders; also of Holothurians having a pair of respiratory organs.
This entry has not yet been fully updated (first published 1896; most recently modified version published online June 2018).