periphrastic conjugation

from The Collaborative International Dictionary of English v.0.48

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.
   [1913 Webster]

   {Periphrastic conjugation} (Gram.), a conjugation formed by
      the use of the simple verb with one or more auxiliaries.
      [1913 Webster]