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titer

American  
[tahy-ter, tee-] / ˈtaɪ tər, ˈti- /
especially British, titre

noun

Chemistry, Medicine/Medical.
  1. the strength of a solution as determined by titration with a standard substance.

  2. the concentration of a substance in a given sample as determined by titration.


titer British  
/ ˈtiː-, ˈtaɪtə /

noun

  1. the usual US spelling of titre

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

titer Scientific  
/ tītər /
  1. The concentration of a substance in solution or the strength of such a substance as determined by titration.

  2. The minimum volume of a solution needed to cause a particular result in titration.

  3. The concentration of antibodies present in the highest dilution of a serum sample at which visible clumps with an appropriate antigen are formed.


Etymology

Origin of titer

1830–40; < French titre title, qualification, fineness of alloyed gold or silver < Latin titulus title

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

You might have heard about a titer test, which looks at the amount of antibodies in a person’s blood in order to confirm that they are immune.

From Slate Mar. 12, 2025

A: In our model, we give it at a very low titer and it causes a very significant, very itchy, full body rash.

From Science Magazine Oct. 26, 2023

“Omicron BA.2 is not neutralized with detectable titer by any of the therapeutic monoclonal antibodies, including sotrovimab,” researchers from the NYU Grossman School of Medicine said in the study, which hasn’t been peer-reviewed.

From Washington Times Feb. 21, 2022

He put it in a saline solution, injected himself just under the surface of the skin of his upper arm and then took a so-called titer test to look for antibodies in his bloodstream.

From New York Times Sep. 1, 2020

Allow the thermometer to hang quietly with the bulb in the center of the tube and report the highest point to which the mercury rises as the titer of the fatty acids.

From Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant. by Thomssen, E. G.

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