history - What was wrong with the word Talmud?

The Wikipedia article on The Talmud says:

and Pope Pius IV commanded, in 1565, that the Talmud be deprived of its very name. The convention of referring to the work as "Shas" (shishah sidre Mishnah) instead of "Talmud" dates from this time. (Hastings, James. Encyclopedia of Religion and Ethics Part 23, p 186)

I also remember seeing text in the Talmud itself, where the word Talmud had been changed to Gemara (I can't remember exactly where).

What was wrong with the word Talmud, that it had to be censored?

Answer

In the introduction to the Vilna Edition of the Ein Yaakov by publishers, a short history of the printing of the Talmud is given (this is perhaps the source for Marcus Jastrow's speech, below).

On this page, in the middle of the second column, it gives a reason why the word Talmud was censored from inside of the Gemara, even when the word is not actually referring to the Gemara, but rather to learning.

This started with the Basle edition of the Talmud. The Basle edition of the Talmud was printed under heavy censorship (see here). Because it was forbidden to call the Talmud by name, a zealous censor took it upon himself to change any mention of the Talmud to "Shas" or Gemara".

Other reprints copied this, not realizing it was a result of censorship.

This is discussed at length in the Sefer Dikdukei Sofrim, Megilla, where it talks about the printing of the Talmud.

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Marcus Jastrow, in a speech titled THE HISTORY AND THE FUTURE OF THE TALMUDIC TEXT - A LECTURE DELIVERED BEFORE THE GRATZ COLLEGE OF PHILADELPHIA - December 9, 1895 said as follows:

" Pope Gregory IX, in 1239, decreed the cremation of the Talmud, and hundreds and thousands of copies were burnt in France and Italy. In 1264, Pope Clement IV set the penalty of death on whatsoever person should harbor a copy of the Talmud in his house."

...

The printing of the Talmud began as early as 1494 in Soncino. The luckless book was still under the ban of the papal and imperial interdicts, and even when, thanks to the untiring efforts of influential Jews and Christians, fortified by offers of bribes more or less open and direct, permission to print was granted (by Pope Leo X, in 1520), it was so guarded and restricted as to make a complete and accurate edition an impossibility.

...

That the permission granted by Leo X did not secure immunity from persecution, we learn from the fact men- tioned before, that autos-da-fe, were renewed at intervals from 1533 to 1599. In fact, when, in 1564, at the Council of Trent, the Italian Jews petitioned for permission to republish the Talmud, the license granted was, in spite of a vast amount of Jewish money in the pockets of the Bishops, still more restrictive. Even the title Talmud was to be omitted. We do not find, how- ever, that the Italian printing houses availed themselves of this dubious mercy.