prochiral
/prəʊˈkʌɪrəl/ /prəʊˈkʌɪr(ə)l/Chemistry
adjective
Designating a molecule which is not chiral but can become so by means of a simple reaction such as a substitution. Also: designating an atom or group at which such a reaction can produce a chiral structure.
Origin
1960s. From pro- + chiral.