1

serum

noun se·rum \ ˈsir-əm \
Updated on: 8 Nov 2017

Definition of serum

plural sera play \ˈsir-ə\ or serums
1 :the watery portion of an animal fluid remaining after coagulation:
a (1) :blood serum
(2) :antiserum
b :whey
c :a normal or pathological serous fluid (as in a blister)
2 :the watery part of a plant fluid
3 :a usually lightweight cosmetic preparation especially for use on the face; specifically :a typically water-based, often concentrated preparation that lacks lubricating and thickening agents
  • an antiaging facial serum

Examples of serum in a Sentence

  1. The patient was administered serum.

Recent Examples of serum from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'serum.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Origin and Etymology of serum

Latin, whey, wheylike fluid; akin to Greek oros whey


2

serum

adjective

Definition of serum

:occurring or found in the blood serum
  • serum cholesterol
  • serum antibodies

First Known Use of serum

1876


SERUM Defined for English Language Learners

serum

noun

Definition of serum for English Language Learners

  • medical : the part of blood that is like water and that contains substances (called antibodies) that fight disease

  • medical : serum from an animal's blood that can be added to a person's blood to prevent or cure disease

  • biology : the watery part of a fluid found in a plant


SERUM Defined for Kids

serum

noun se·rum \ ˈsir-əm \

Definition of serum for Students

:the clear liquid part that can be separated from coagulated blood and contains antibodies

Medical Dictionary

1

serum

noun se·rum \ ˈsir-əm \

medical Definition of serum

plural sera play \\ or serums
: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)

2

serum

adjective

medical Definition of serum

:occurring or found in the serum of the blood
  • serum cholesterol
  • serum glutamic-oxaloacetic transminase


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