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n. 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.

n. a complex red organic pigment containing iron and other atoms to which oxygen binds

""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."

pigment   

Wikipedia article on haem    haemoglobin    red blood cell    bilirubin   

heme    glycan    ascorbate    proinflammatory    monoterpene    ribosome-inactivating    oleoresin    triacylglycerol    cytochrome    metabolite