zero-orderhttp://www.oed.com/dictionary/zero-order_adj%3Ftab%3Dmeaning_and_usezero-order, adj.
First published 2017

zero-orderadjective

  1. 1919–
    a. Statistics designating the degree of correlation between two variables when no other variables are held constant; (also) of or relating to this; b. Chemistry designating a chemical reaction in which the rate of reaction is constant and (apparently) independent of the concentration of the reactant; (also) designating an equation modelling such a reaction.
    1. 1919
      The zero order coefficients were all determined by the direct product-moment method, without the formation of correlation tables.
      Public Health Rep. (U.S. Public Health Service) vol. 34 1773
    2. 1926
      When small amounts of solid are used, the reaction is better represented by a ‘zero’ order than by a first-order equation.
      American Chem. Society vol. 48 2860
    3. 1929
      The correlation between score and experience when the factor of age is kept constant is seen to be slightly higher than the zero order correlation.
      Journal Educ. Research vol. 19 316/2
    4. 1978
      This means that changing the concentration of X will not affect the rate of a reaction which is zero order with respect to X.
      G. C. Hill & J. S. Holman, Chemistry in Context xxiii. 359
    5. 2012
      For a zero-order reaction, the rate is constant.
      S. A. Zumdahl & S. S. Zumdahl, Chemistry xii. 544
    6. 2012
      The zero-order correlation between this measure of Allport's optimal conditions and secular volunteering is higher..than the correlation for mainline respondents.
      E. M. Uslaner, Segregation & Mistrust vii. 182

Originally published as part of the entry for zero, n. & adj.

zero-order, adj. was first published in 2017.