revisionism n.

1610s, "act of looking over again, re-examination and correction," from French révision, from Late Latin revisionem (nominative revisio) "a seeing again," noun of action from past-participle stem of Latin revidere "see again, go to see again" (see revise). Meaning "that which is revised, a product of revision" is from 1845.

word-forming element making nouns implying a practice, system, doctrine, etc., from French -isme or directly from Latin -isma, -ismus (source also of Italian, Spanish -ismo, Dutch, German -ismus), from Greek -ismos, noun ending signifying the practice or teaching of a thing, from the stem of verbs in -izein, a verb-forming element denoting the doing of the noun or adjective to which it is attached. For distinction of use, see -ity. The related Greek suffix -isma(t)- affects some forms.