| NOUN | substance | Hb, hemoglobin, haemoglobin | a hemoprotein composed of globin and heme that gives red blood cells their characteristic color |
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| Meaning | A hemoprotein composed of globin and heme that gives red blood cells their characteristic color; function primarily to transport oxygen from the lungs to the body tissues. | |
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| Synonyms | hemoglobin, haemoglobin | |
| Narrower | oxyhemoglobin, oxyhaemoglobin | The bright red hemoglobin that is a combination of hemoglobin and oxygen from the lungs |
| Broader | hemoprotein, haemoprotein | A conjugated protein linked to a compound of iron and porphyrin |
| Substance of | red blood cell, RBC, erythrocyte | A mature blood cell that contains hemoglobin to carry oxygen to the bodily tissues |
| Substances | globin, hematohiston, haematohiston | A colorless protein obtained by removing heme from hemoglobin |
| heme, haem, hematin, haemitin, protoheme | A complex red organic pigment containing iron and other atoms to which oxygen binds | |
| Spanish | hemoglobina | |
| Catalan | hemoglobina | |
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