This book is devoted to the medieval Byzantine Karaite contribution to Jewish creativeness and culture in the fields of Hebrew grammar and philological interpretation of the Bible. 0It is commonly agreed that Byzantine Karaism is vastly different from its older Karaite sister movement. In Byzantium, Karaism exchanged its Muslim environment and the characteristic discourse with which it was associated, and was required to redefine itself, vis-à-vis both the Jewish rabbinic majority and the broader sociocultural arena of Greek Christian host society. For the researchers of Karaite Judaism, its development under the influence of Christianity poses a complex challenge, one that has yet to be undertaken. 0The study focuses on three prominent Karaite scholars who were connected with Constantinople from the last decades of the 11th century until the end of the second decade of the 14th century. It examines the linguistic issues that arise in the writings of these scholars, exploring their roots in the early Karaite tradition, and comparing them with rabbinic conceptions that were prevalent during their time and even earlier. Clarification and analysis of topics related to the aforementioned subjects and terminology may serve as a window to comprehending the extent of the knowledge of the Hebrew scholarship and the unique perspective on it in the Constantinopolitan Karaite community, as well as may shed further light on the diachrony of Hebrew linguistic thought.