The Collaborative International Dictionary
Periphrastical
Periphrastic \Per`i*phras"tic\, Periphrastical \Per`i*phras"tic*al\, a. [Gr. ?: cf. F. p['e]riphrastique.] Expressing, or expressed, in more words than are necessary; characterized by periphrase; circumlocutory.
Periphrastic conjugation (Gram.), a conjugation formed by the use of the simple verb with one or more auxiliaries.
Wiktionary
periphrastical
a. (alternative form of periphrastic English)