serum

se·rum   (sîr'əm)    n.   pl. se·rums or se·ra (sîr'ə) The clear yellowish fluid obtained upon separating whole blood into its solid and liquid components after it has been allowed to clot. Also called blood serum. Blood serum from the tissues of immunized animals, containing antibodies and used to transfer immunity to another individual. Watery fluid from animal tissue, such as that found in edema. Whey. [Latin, whey, serum.]

serum 

Main Entry: ¹se·rum
Pronunciation: 'sir-&m
Function: noun
Inflected Form: plural serums or se·ra /-&/
: the watery portion of an animal fluid remaining after coagulation: a (1) : the clear yellowish fluid that remains from blood plasma after fibrinogen,prothrombin, and other clotting factors have been removed by clot formation called also blood serum (2) : ANTISERUM b : a normal or pathological serous fluid (as in a blister)

serum se·rum (sēr'əm)
n. pl. se·rums or se·ra (sēr'ə)

1. A watery fluid, especially one that moistens the surface of serous membranes or that is exuded by such membranes when they become inflamed.

2. The clear yellowish fluid obtained upon separating whole blood into its solid and liquid components.

3. Such fluid from the tissues of immunized animals, containing antibodies and used to transfer immunity to another individual.

serum

the portion of plasma remaining after coagulation of blood, during which process the plasma protein fibrinogen is converted to fibrin and remains behind in the clot. Antiserum, which is prepared from the blood of animals or humans that have been exposed to a disease and have developed specific antibodies, is used to protect persons against disease to which they have been exposed.

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