Noun
ecthesis (uncountable)
(logic, historical) An exposition or setting out; used by Aristotle in setting forth various proofs, though the nature of the process is disputed; perhaps simply writing out in letter notation.
Theodore planned the Lateran Council of 649 to condemn the Ecthesis, but died before he could convene it, which his successor, Pope Martin I (649-53), did. Source: Internet
Three years later the patriarch came up with a slightly modified formula, which Heraclius released as the Ecthesis in 638. This edict was considered to be the official response to Sophronius' letter. Source: Internet
Only rarely did he use other Greek versions (to Aquila once in the Ecthesis, to other versions once or twice on the Psalms), and his knowledge of the Old Testament was limited to the Septuagint. Source: Internet