Definition of titer
: the strength of a solution or the concentration of a substance in solution as determined by titration
Origin of titer
French titre title, proportion of gold or silver in a coin, from Old French title inscription, title
First Known Use: 1868
Medical Definition of titer
1a: the strength of a solution or the concentration of a substance in solution as determined by titrationb: the dilution of a serum containing a specific antibody at which the solution just retains a specific activity (as neutralizing or precipitating an antigen) which it loses at any greater dilution <a test for toxoplasmosis antibodies yielded a titer of 1:1024>
2: the solidifying point of the fatty acids liberated from a fat that is determined by melting the acids in a tube and noting the temperature at which they solidify again on cooling
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Medical Dictionary: Definition of "titer"
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