Noun
Greek numerals pl (normally plural, singular Greek numeral)
A system of numerals represented by letters of the Greek alphabet. These are used for special purposes, where in English Roman numerals might be used. The numerals are formed by the addition of a mark to the upper or lower case letter, i.e. Γ΄, δ΄, θ΄. In addition to the usual Greek letters three additional symbols are used: stigma (ϛ), koppa (ϟ) and sampi (ϡ); stigma (Ϛ or ϛ) may also be represented by ΣΤ΄ or στ΄.
A notable exception to the use of Roman numerals in Europe is in Greece, where Greek numerals (based on the Greek alphabet) are generally used in contexts where Roman numerals would be used elsewhere. Source: Internet
In the system of Greek numerals it has the value five. Source: Internet
The system was adopted from that of the Greek numerals in the late 2nd century BC; it is also known as the Hebrew alphabetic numerals to contrast with earlier systems of writing numerals used in classical antiquity. Source: Internet
Unlike Cyrillic numerals, which inherited their numeric value from the corresponding Greek letter (see Greek numerals ), Glagolitic letters were assigned values based on their native alphabetic order. Source: Internet