אאלר"ן, a fictitious word made up of each third letter in מנא̇ מנא̇ תקל̇ ופר̇סין̇ (Dan. V, 25). Snh. 22ᵃ; Cant. R. to III, 4 ממתו"ס וכ׳ the inscription on the wall was so arranged as to form words composed of its every first, every second and every third letter respectively.