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Letters standing for numbers.
Also known as: Abjad reckoning, Letter numerals
The Arabic system giving each letter of the alphabet a numeric value, used for dating, ordering and chronograms.
Assigns a numeric value to each Arabic letter, giving the units, the tens, the hundreds and a thousand.
Contexts: Mathematics, History
Depends on the older Semitic alphabet order, not the modern Arabic one, which is why the values look unrelated to the alphabet a modern reader knows.
Contexts: Mathematics, History
Used to write a date as a phrase whose letters sum to the year — a chronogram — so a building inscription can carry its own date inside a sentence of praise.
Contexts: Mathematics, History
Ordinary Arabic letters read as numbers, the alphabet taken in its older order rather than its modern one.