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titre

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

noun

Chiefly British.
  1. a variant of titer.


titre British  
/ ˈtaɪtə, ˈtiː- /

noun

    1. the concentration of a solution as determined by titration

    2. the minimum quantity of a solution required to complete a reaction in a titration

  1. the quantity of antibody present in an organism

"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

Etymology

Origin of titre

C19: from French titre proportion of gold or silver in an alloy, from Old French title title