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[ik-stree-muh l] /ɪkˈstri məl/
adjective, Mathematics
of or relating to an extremum or the calculation of extrema:
an extremal problem.
Origin of extremal
1400-50; late Middle English. See extrem(um), -al1 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for extremal
  • The second is an improved technique for varying time extremal ship tracks toward admissibility.
  • More specifically, it is a set of tools and techniques for bounding extremal eigenvalues.
British Dictionary definitions for extremal


(maths, logic) the clause in a recursive definition that specifies that no items other than those generated by the stated rules fall within the definition, as in 1 is an integer, if n is an integer so is n+1, and nothing else is
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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