noun (Chemical Engineering: Reactors and separators) Selectivity is the degree to which a solvent prefers a particular solute. ⇒ The adsorbent contactor has a selectivity for CO₂ over CH₄ of at least 5. ⇒ The solvent selected should exhibit a high selectivity - it must dissolve the maximum amount of the solute. ⇒ Selectivity is the degree to which a solvent prefers a particular solute.
Collins English Dictionary. Copyright © Harper Collins Publishers