Also tosafoth. [Heb. tōsāphōth, pl. of tōsāphāh addition, f. yāsaph to add.] Critical and explanatory notes on the Talmud. Hence Tosaphist (-fist), a writer of tosaphoth.

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1866.  Jrnl. Sacr. Lit., IX. July, 359. Here we may distinguish … Tōsāphōth, additions or appendices to the Talmūd.

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1887.  H. Adler, in Papers Anglo-Jewish Hist. Exhib., 272. The marvellously exhaustive list of Tosafists (authors of comments on the Talmud) contained in Zunz’s ‘Zur Geschichte und Literatur.’

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