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Related to serum: Serum creatinine


see bloodblood,
fluid pumped by the heart that circulates throughout the body via the arteries, veins, and capillaries (see circulatory system; heart). An adult male of average size normally has about 6 quarts (5.6 liters) of blood.
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The liquid portion that remains when blood is allowed to clot spontaneously and is then centrifuged to remove the blood cells and clotting elements. It has approximately the same volume (55%) as plasma and differs from it only by the absence of fibrinogen. See Fibrinogen

Blood serum contains 6–8% solids, including macromolecules such as albumin, antibodies and other globulins, and enzymes; peptide and lipid-based hormones; and cytokines; as well as certain nutritive organic materials in small amounts, such as amino acids, glucose, and fats. Somewhat less than 1% of the serum consists of inorganic substances. Small amounts of respiratory gases are dissolved in the serum, as is the gas nitric oxide, which serves as a chemical messenger and vasodilator. Small amounts of waste material are also present. These substances, along with other small molecules which are not bound to blood proteins, are filtered out as blood flows through the kidney. See Blood, Kidney

Certain types of sera, both human and animals, are used in clinical medicine. Immune serum and hyperimmune serum either are developed by naturally occurring disease or are deliberately prepared by repeated injection of antigens to increase antibody titer for either diagnostic tests or the treatment of active disease. These sera are referred to as antisera, since they have a specific antagonistic action against specific antigens. See Antibody, Antigen, Biologicals, Immunity

By custom, the clear portion of any liquid material of animal origin separated from its solid or cellular elements is also referred to as sera. These fluids are more properly referred to as effusions. See Serology

McGraw-Hill Concise Encyclopedia of Bioscience. © 2002 by The McGraw-Hill Companies, Inc.


The liquid portion that remains when blood clots spontaneously and the formed and clotting elements are removed by centrifugation; it differs from plasma by the absence of fibrinogen.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.


1. See blood serum
2. antitoxin obtained from the blood serum of immunized animals
3. Physiol zoology clear watery fluid, esp that exuded by serous membranes
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
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"Serums penetrate the skin quicker and work faster than alternatives, such as moisturiser, and you only need to use a small amount.
After 5 days of monitored lithium ingestion serial serum samples of patients in study were collected with the consent of the individuals.
In April 2017, the No7 Line Correcting Booster serum was so hotly anticipated there was an online waiting list with 17,500 names on it.
Five millilitres of blood was collected from antecubital vein of each subject under aseptic conditions and serum was subsequently obtained through ultracentrifugation which was subsequently stored at-80 degrees Celsius in Eppendorf tubes for the measurement of biochemical parameters i.e.; Cystatin-C and creatinine.
Dove 1-Minute Serum Conditioner is at supermarkets, and online on Lazada, Shopee, BeautyMNL, Calyxta.
The data about significant higher serum HEX activity (388.2 [+ or -] 113.0 nKat/L) of male neonates in comparison to female neonates (335.3 [+ or -] 110.0 nKat/L) (p = 0.014 *) (Figure 2(d)) are in agreement with reports of other authors [29-32].
4 SKINSENSE REVITALISING FACIAL SERUM PS36, QVC WHEN beauty guru Abi Cleeve, the brains behind the brilliant Ultrasun, revealed she was launching her own skincare range, we knew it was going to be good.
Serum total testosterone levels were measured at 3 months to confirm reduction to a castration level (<50 ng/dl).
KEY WORDS: chronic liver disease; viral hepatitis; serum markers; modified Child-Turcotte-Pugh score.