An alternative or archaic adjective form meaning having respiratory capacity or openings on both sides or ends of an organism.
From 'amphi-' (both) + Greek 'pnoe' (breath) + '-ous' (adjective suffix). A less common variant of amphipneustic, appearing in older scientific literature.
The '-ous' ending in anatomy means 'having' or 'full of'—so amphipnous literally means 'having breath on both sides,' though the '-tic' form (amphipneustic) became the standard scientific adjective.
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