[ex.or.di.um] n, pl -diums or -dia [L, fr. exordiri to begin, fr. ex- + ordiri to begin--more at order] (1577): a beginning or introduction esp. to a discourse or composition -- ex.or.di.al adj
EXORDIUM
Meaning of EXORDIUM in English
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012