Hemoglobin (noun)

A red protein found in the blood of vertebrates that helps to transport oxygen around the body.

Origin:

Late 19th century: from haemo- "blood" + -globin, from greek glōbē "ball,".

Examples:

1. Hemoglobin is a protein that is found in red blood cells and helps to transport oxygen to the body's cells.
2. Low levels of hemoglobin can indicate anemia, a condition in which there is a deficiency of red blood cells.
3. Hemoglobin is responsible for giving blood its red color.
4. The amount of hemoglobin in the blood can be measured with a simple blood test.
5. Hemoglobin is also important for the transport of carbon dioxide, it binds with the CO2 in the blood and transport it to the lungs for exhalation.