Containing or relating to hemoglobin; having the nature or character of hemoglobin.
From haemoglobin + -ous (full of, characterized by). This adjective form allowed scientists to describe things as 'hemoglobin-like' or 'containing hemoglobin.'
Some deep-sea creatures have strange haemoglobinous proteins adapted to work in nearly oxygen-free waters—evolution has tweaked hemoglobin's iron chemistry in amazing ways to help life survive in extreme environments.
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