Adjective
English Wikipedia has an article on:prochiralWikipedia
prochiral (not comparable)
(chemistry) having two constitutionally identical ligands (atoms or groups), replacement of either one by a different ligand making the molecule chiral
However, one should note that adding a chemical group to the prochiral center from the re-face will not always lead to an S stereocenter, as the priority of the chemical group has to be taken into account. Source: Internet
In the above-mentioned example, if chloride (Cl-) was added to the prochiral center from the re-face, this would result in an R-enantiomer. Source: Internet