The Coptic alphabet is the script used for writing the Coptic language

Coptic language

Coptic or Coptic Egyptian is the current stage of the Egyptian language, a northern Afro-Asiatic language spoken in Egypt until at least the 17th century. Egyptian began to be written using the Greek alphabet in the 1st century...

. The repertoire of glyph

Glyph

A glyph is an element of writing: an individual mark on a written medium that contributes to the meaning of what is written. A glyph is made up of one or more graphemes....

s is based on the Greek alphabet

Greek alphabet

The Greek alphabet is the script that has been used to write the Greek language since at least 730 BC . The alphabet in its classical and modern form consists of 24 letters ordered in sequence from alpha to omega...

 augmented by letters borrowed from the Demotic

Demotic (Egyptian)

Demotic refers to either the ancient Egyptian script derived from northern forms of hieratic used in the Delta, or the stage of the Egyptian language following Late Egyptian and preceding Coptic. The term was first used by the Greek historian Herodotus to distinguish it from hieratic and...

 and is the first alphabetic script used for the Egyptian language

Egyptian language

Egyptian is the oldest known indigenous language of Egypt and a branch of the Afroasiatic language family. Written records of the Egyptian language have been dated from about 3400 BC, making it one of the oldest recorded languages known. Egyptian was spoken until the late 17th century AD in the...

. There are, in fact, several Coptic alphabets as the Coptic writing system may vary greatly among the various dialects and subdialects of the Coptic language

Coptic language

Coptic or Coptic Egyptian is the current stage of the Egyptian language, a northern Afro-Asiatic language spoken in Egypt until at least the 17th century. Egyptian began to be written using the Greek alphabet in the 1st century...

.
The Coptic alphabet has a long history, going back to the Hellenistic

Ptolemaic Egypt

Ptolemaic Egypt began when Ptolemy I Soter invaded Egypt and declared himself Pharaoh of Egypt in 305 BC and ended with the death of queen Cleopatra VII of Egypt and the Roman conquest in 30 BC. The Ptolemaic Kingdom was a powerful Hellenistic state, extending from southern Syria in the east, to...

 period, of using the Greek alphabet to transcribe

Transcription (linguistics)

Transcription in the linguistic sense is the systematic representation of language in written form. The source can either be utterances or preexisting text in another writing system, although some linguists only consider the former as transcription.Transcription should not be confused with...

 Demotic texts, with the aim of recording the correct pronunciation of Demotic.