noun, plural ep·i·pho·ne·mas, ep·i·pho·ne·mae [ep-uh-foh-nee-mee] /ˌɛp ə foʊˈni mi/. Rhetoric. 1. a sentence that is an exclamation, a general or striking comment, or a succinct summary of what has previously been said.
Origin: 1570–80; < Latin epiphōnēma exclamation < Greek epiphṓnēma. See epi-, phoneme
EXAMPLES FROM THE WEB FOR EPIPHONEMA It has no passage quite up to the Invocation—Epiphonema, to give it the technical term—of the later poem. A HISTORY OF ENGLISH LITERATURE|GEORGE SAINTSBURY
Now YOU come up with a sentence (or fic? or graphic?) that best illustrates the word.