ecphonesis

from WordNet (r) 3.0 (2006)

ecphonesis
    n 1: an exclamatory rhetorical device; "O tempore! O mores"
         [syn: {ecphonesis}, {exclamation}]

from The Collaborative International Dictionary of English v.0.48

Ecphonesis \Ec`pho*ne"sis\, n. [NL., fr. Gr. ?. See
   {Ecphonema}.] (Rhet.)
   An animated or passionate exclamation.
   [1913 Webster]

         The feelings by the ecphonesis are very various.
                                                  --Gibbs.
   [1913 Webster]