reaction

n.१ (as, exertion of reciprocal or counteracting force or influence) प्रतिक्रिया (स्त्री.) cf. action २ Chem. (as a chemical transformation or chang; the reversible or irreversible interaction of molecules, atoms, ions, etc. to from one or more new substances) अभिक्रिया (स्त्री.) cf. action