Textus Receptus is the name given to a series of Byzantine based Greek texts of the New Testament printed between 1500 and 1900.

The name Textus Receptus was first used to refer to editions of the Greek New Testament, published by the Elzevir Brothers in 1633. The name has been retrospectively applied to all the printed Greek texts of the same Byzantine text-type. The Byzantine text-type represents over 95% of the 5,800+ Greek manuscripts of the New Testament still in existence today.

Textus Receptus contains the translation base for the first Greek translation of the New Testament into English by William Tyndale and is the textual base for the Bishops Bible, the Geneva Bible and the King James Bible.

This information is from the King James Bible, Online Study Bible

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