Acrostic

An acrostic (from the late Greek akróstichis, from ákros, "top", and stíchos, "verse") is a poem or other form of writing in an alphabetic script, in which the first letter, syllable or word of each line, paragraph or other recurring feature in the text spells out a word or a message. As a form of constrained writing, an acrostic can be used as a mnemonic device to aid memory retrieval. A famous acrostic was made in Greek for the acclamation JESUS CHRIST, GOD'S SON, SAVIOUR (Ιησούς Χριστός, Θεού Υιός, Σωτήρ; Iesous CHristos, THeou Yios, Soter — ch and th being each one letter in Greek). The initials spell ICHTHYS (ΙΧΘΥΣ), Greek for fish – hence the frequent use of the fish as a symbol for Jesus Christ from the early days of Christianity to the present time.