The Collaborative International Dictionary of English v.0.48:

Ecbasis \Ec"ba*sis\ ([e^]k"b[.a]*s[i^]s), n. [L., fr. Gr.
   'e`kbasis a going out, issue, or event; 'ek out + bai`nein to
   go.] (Rhet.)
   A figure in which the orator treats of things according to
   their events consequences.
   [1913 Webster]