Wiktionary
n. A cabalistic method of derive a sentence from a word, using the letters of the word as initial letters of words in the sentence.
Wikipedia
Notarikon is a method of deriving a word, by using each of its initial (Hebrew: ראשי תיבות) or final (Hebrew: סופי תיבות) letters to stand for another, to form a sentence or idea out of the words. Another variation uses the first and last letters, or the two middle letters of a word, in order to form another word. The word "notarikon" is borrowed from the Greek language (νοταρικόν)), and was derived from the Latin word "notarius" meaning "shorthand writer."
Notarikon is one of the three ancient methods used by the Kabbalists (the other two are gematria and temurah) to rearrange words and sentences. These methods were used in order to derive the esoteric substratum and deeper spiritual meaning of the words in the Bible. Notarikon was also used in alchemy.
Usage examples of "notarikon".
Then, the counting machines that proclaimed the triumph of the quantitative but in truth pointed to the occult qualities of numbers, a return to the roots of the notarikon the rabbis carried with them as they fled through the plains of Europe.
They would use the notarikon, the gematria, the temurah, treating the disks like the Torah, and therefore would require as much time as had passed since the writing of the Sefer Yesirah.
In that case he would have had to apply the notarikon to the temurah, to invent an acrostic to remember the word.