Prodelision or Inverse Elision takes place when a word ending in a long vowel or diphthong is immediately followed by another word beginning with a short vowel. Though it is very occasionally found in inscriptions and in the manuscripts of certain prose authors, particularly those of Plato—almost uniquely and its cases—it is to be considered as essentially a verse phenomenon, affecting as it does the metre of the line in which it occurs. Prodelision was unknown to Homer and Hesiod, is rare in lyric, and seems only to come into real use with the dramatists of the fifth century. An examination of the practice of the three tragedians and of Aristophanes is not without interest in itself and may occasionally throw some light on points of textual criticism.