plaintext

[pleyn-tekst] /ˈpleɪnˌtɛkst/
noun
1.
the intelligible original message of a cryptogram, as opposed to the coded or enciphered version.
Also called clear text.
Compare cryptography.
Origin
1915-20; plain1 + text
British Dictionary definitions for plain text

plain text

noun
1.
(telecomm) a message set in a directly readable form rather than in coded groups