reactantadj.n.

1915 Jrnl. Amer. Chem. Soc. 37 984 A catalytic agent is a substance which..has the power of opening up the closed fields of the reactant molecules to a greater extent than they otherwise would be.

1933 Sci. Monthly Nov. 480/2 This is impossible..when the ionization potential of the inert gas, like xenon, is lower than that of the reactant gas, like acetylene.

1973 J. G. Tweeddale Materials Technol. II. ii. 23 Gases such as oxygen, hydrogen and nitrogen..are much more soluble in, or reactant to, the liquid state of a material than they are to the solid state.

2000 Science 14 Apr. 303/1 To understand the nature of the interface..with which OH and other reactant gases in this system interact, we performed a series of molecular dynamics simulations.

1916 Jrnl. Amer. Chem. Soc. 38 2296 This magnitude varies with the specific heats of the reacting substances..according to the equation dU/dT = ΣnC the summation sign indicating an algebraic summation (reactants positive, resultants negative) of the molecular heats of the substances.

1928 Chem. Rev. 5 67 In hydrogenation there is an optimum ratio to the partial pressures of the reactants.

1936 S. Glasstone Recent Adv. Gen. Chem. vii. 321 The product is much more polar than the reactants.

1964 P. J. Hills Small Scale Org. Prepar. ii. 12 In the preparation of organic liquids the reactants are often mixed in a flask or test-tube.

2002 M. D. Greenfield Signalers & Receivers v. 241 Firefly light organs..consist of photocytes, specialized cells containing the bioluminescent reactants.