serum

[seer-uhm]
noun, plural serums, sera [seer-uh] .
1.
the clear, pale-yellow liquid that separates from the clot in the coagulation of blood; blood serum.
3.
any watery animal fluid.
4.
the thin, clear part of the fluid of plants.
5.
milk whey.

Origin:
1655–65; < Latin: whey

serumal, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To serum
Collins
World English Dictionary
serum (ˈsɪərəm)
 
n , pl -rums, -ra
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
4.  a less common word for whey
 
[C17: from Latin: whey]
 
'serumal
 
adj

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
Etymonline
Word Origin & History

serum
1672, "watery animal fluid," from L. serum "watery fluid, whey," from PIE base *ser-/*sor- "to run, flow" (cf. Gk. oros "whey;" Skt. sarah "flowing," sarit "brook, river"). First applied 1893 to blood serum used in medical treatments.
Online Etymology Dictionary, © 2010 Douglas Harper
Cite This Source
American Heritage
Medical Dictionary

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.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Cite This Source
American Heritage
Science Dictionary
serum   (sîr'əm)  Pronunciation Key 
Plural serums or sera
  1. See blood serum.

  2. Blood serum extracted from an animal that has immunity to a particular disease. The serum contains antibodies to one or more specific disease antigens, and when injected into humans or other animals, it can transfer immunity to those diseases.


The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source
Encyclopedia Britannica
Encyclopedia

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.

Learn more about serum with a free trial on Britannica.com.

Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
Cite This Source
Example sentences
Serum myoglobin is a test that measures the amount of myoglobin in the blood.
If you haven't already, get a serum ferritin test to check if the iron you are
  taking orally is being absorbed.
Human serum destroyed only eight of the bacterial strains.
Serum immunoelectrophoresis is a test that measures immunoglobulins in the
  blood.
Copyright © 2014 Dictionary.com, LLC. All rights reserved.
  • Please Login or Sign Up to use the Recent Searches feature