The quality or state of being amphibious; the characteristic of being able to thrive in multiple environments.
From 'amphibious' plus the abstract noun suffix '-ness,' which creates nouns representing qualities, states, or conditions.
The amphibiousness of certain species has proven essential in medicine—compounds from poison dart frog skin have led to painkillers 1,000 times more powerful than morphine, demonstrating how nature's extreme adaptations hide pharmaceutical gold.
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