hemoglobin

3 ENTRIES FOUND:

he·mo·glo·bin

noun \ˈhē-mə-ˌglō-bən\

: the part of blood that contains iron, carries oxygen through the body, and gives blood its red color

Full Definition of HEMOGLOBIN

1
:  an iron-containing respiratory pigment of vertebrate red blood cells that consists of a globin composed of four subunits each of which is linked to a heme molecule, that functions in oxygen transport to the tissues after conversion to oxygenated form in the gills or lungs, and that assists in carbon dioxide transport back to the gills or lungs after surrender of its oxygen
2
:  any of numerous iron-containing respiratory pigments of various organisms (as invertebrates and yeasts)

Origin of HEMOGLOBIN

International Scientific Vocabulary, short for earlier hematoglobulin
First Known Use: 1869

Other Biochemistry Terms

bile, biodegradable, capsaicin, keratin, metabolism

he·mo·glo·bin

noun    (Medical Dictionary)

Medical Definition of HEMOGLOBIN

1
: an iron-containing respiratory pigment of vertebrate red blood cells that functions primarily in the transport of oxygen from the lungs to the tissues of the body, that consists of four polypeptide chains of which two are of the type designated alpha and two are of one of the types designated beta, gamma, or delta and each of which is linked to a heme molecule, that combines loosely and reversibly with oxygen in the lungs or gills to form oxyhemoglobin and with carbon dioxide in the tissues to form carbhemoglobin, that in humans is present normally in blood to the extent of 14 to 16 grams in 100 milliliters expressed sometimes on a scale of 0 to 100 with an average normal value (as 15 grams) taken as 100, and that is determined in blood either colorimetrically or by quantitative estimation of the iron present—see fetal hemoglobin, hemoglobin a; compare carboxyhemoglobin, methemoglobin
2
: any of numerous iron-containing respiratory pigments of various organisms (as invertebrates and yeasts)
he·mo·glo·bin·ic or chiefly British hae·mo·glo·bin·ic \ˌhē-mə-glō-ˈbin-ik\ adjective
he·mo·glo·bi·nous or chiefly British hae·mo·glo·bi·nous \-ˈglō-bə-nəs\ adjective

Variants of HEMOGLOBIN

he·mo·glo·bin or chiefly British hae·mo·glo·bin \ˈhē-mə-ˌglō-bən\

hemoglobin

noun    (Concise Encyclopedia)

Protein in the blood of many animals (in vertebrates it is in red blood cells) that transports oxygen from the lungs to the tissues. It is bright red when combined with oxygen and purple-blue in the deoxygenated state. Each molecule is made up of a globin (a type of protein) and four heme groups. Heme, a complex heterocyclic compound, is an organic molecule derived from porphyrin with an iron atom at the centre. Variant hemoglobins (see sickle-cell anemia; hemoglobinopathy) can be used to trace past human migrations and to study genetic relationships among populations.

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