Proper noun
Tosafot
(historical) Medieval commentaries on the Talmud, in the form of critical and explanatory glosses.
After Rashi the Tosafot were written, which was an omnibus commentary on the Talmud by the disciples and descendants of Rashi; this commentary was based on discussions done in the rabbinic academies of Germany and France. Source: Internet
Although they were not available for many generations, the removed sections of the Talmud, Rashi, Tosafot and Maharsha were preserved through rare printings of lists of errata, known as Chesronos Hashas ("Omissions of the Talmud"). Source: Internet
Historically Sephardim studied the Tosefot ha-Rosh and the commentaries of Nahmanides in preference to the printed Tosafot. Source: Internet
Medieval Ashkenazic Jewry produced another major commentary known as Tosafot ("additions" or "supplements"). Source: Internet
For a list see Ephraim Urbach, s.v. "Tosafot," in Encyclopedia of Religion. Source: Internet
In general, Rashi provides the pshat or literal meaning of Jewish texts, while his disciples known as the Tosafot ("additions"), criticized his work and gave more interpretative descriptions of the texts. Source: Internet