HEMOGLOBIN
hemoglobin, haemoglobin, Hb
(noun) 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; “fish have simpler hemoglobin than mammals”
Source: WordNet® 3.1
Etymology
Noun
hemoglobin (countable and uncountable, plural hemoglobins)
(American spelling) The iron-containing substance in red blood cells that transports oxygen from the lungs to the rest of the body; it consists of a protein (globulin), and haem (a porphyrin ring with an atom of iron at its centre).
Synonyms
• Hb
• Hgb
• HGB
Source: Wiktionary
Hem"o*glo"bin, n. Etym: [Hemo- + globe.] (Physiol.)
Definition: The normal coloring matter of the red blood corpuscles of
vertebrate animals. It is composed of hematin and globulin, and is
also called hæmatoglobulin. In arterial blood, it is always combined
with oxygen, and is then called oxyhemoglobin. It crystallizes under
different forms from different animals, and when crystallized, is
called hæmatocrystallin. See Blood crystal, under Blood.
Source: Webster’s Unabridged Dictionary 1913 Edition