Attic numerals
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Attic numerals were used by the ancient Greeks, possibly from the 7th century BC. They were also known as Herodianic numerals because they were first described in a 2nd century manuscript by Herodian. They are also known as acrophonic numerals because all of the symbols used (except for 1) derive from the first letters of the words that the symbols represent: five, ten, hundred, thousand and ten thousand. See Greek numerals and acrophony.
Decimal | Symbol | Greek numeral |
---|---|---|
1 | Ι | -- |
5 | Π | πεντε (pente) |
10 | Δ | δέκα (deka) |
100 | Η | ἑκατόν (hekaton) |
1000 | Χ | χίλιοι (khilioi) |
10000 | Μ | μυριάς (myrias) |
The use of Η for 100 reflects the early date of this numbering system: Η (Eta) in the early Attic alphabet represented the sound /h/. In later, "classical" Greek, with the adoption of the Ionic alphabet throughout the majority of Greece, the letter eta had come to represent the long e sound while the rough aspiration was no longer marked.[1][2] It wasn't until Aristophanes of Byzantium introduced the various accent markings during the Hellenistic period that the spiritus asper began to represent /h/. Thus the word for a hundred would originally have been written ΗEΚΑΤΟΝ, as compared to the now more familiar spelling ἑκατόν. In modern Greek, the /h/ phoneme has disappeared altogether, but this has had no effect on the basic spelling.
Unlike the more familiar Modern Roman numeral system, the Attic system contains only additive forms. Thus, the number 4 is written ΙΙΙΙ, like the ancient Roman system, rather than the medieval and modern Roman style IV.
In addition, numerals representing 50, 500, 5,000 and 50,000 were composites of the old pi (with a short right leg) and a tiny version of the applicable power of ten. Thus, pi and delta combined into one symbol represented 50, pi and eta represented 500, and so on.