Definition of "haem" [haem]

• The component of haemoglobin responsible for binding oxygen, consists of an iron ion that binds oxygen and a porphyrin ring that binds the globin molecules; one molecule binds one molecule of oxygen. (noun)

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• "And this leaves just the central core of the haemoglobin called the haem group, which is what's known as a porphyrin ring."
• ""Non-haem" iron from plant foods such as baked beans, nuts, seeds and dark green, leafy vegetables is less well absorbed than "haem" iron in meat."
• "Other nutritional virtues include the easily absorbed iron known as "haem" iron."