What does acrostic mean?
The definition of acrostic
A*cros”tic, n.
Etym: [Gr.

1 A composition, usually in verse, in which the first or the last letters of the lines, or certain other letters, taken in order, form a name, word, phrase, or motto.
2 A Hebrew poem in which the lines or stanzas begin with the letters of the alphabet in regular order (as Psalm cxix.). See Abecedarian. Double acrostic, a species of enigma, in which words are to be guessed whose initial and final letters form other words.