relative pronoun: a pronoun (as `that' or `which' or `who') that introduces a relative clause referring to some antecedent
pronoun: a function word that is used in place of a noun or noun phrase
donatism: a schismatic Christian religion in northern Africa from the 4th to the 7th century; held that only those who led a blameless life belonged in the church or could administer the sacraments