The Agron was Saadia Gaon

Saadia Gaon

Saʻadiah ben Yosef Gaon was a prominent rabbi, Jewish philosopher, and exegete of the Geonic period.The first important rabbinic figure to write extensively in Arabic, he is considered the founder of Judeo-Arabic literature...

's first production. It is a double dictionary, the two parts being arranged according to the alphabetic order of initials and of final letters respectively. It was intended to be used in versification, in which acrostics and rime were the chief requisites. In a later edition, Saadia added the Arabic

Arabic language

Arabic is a name applied to the descendants of the Classical Arabic language of the 6th century AD, used most prominently in the Quran, the Islamic Holy Book...

 translation of each word, and also included passages concerning various "memorable subjects of the poets," and named the work in its new form "Kitab al-Shi'r." The Arabic introduction to the second edition and the Hebrew

Hebrew language

Hebrew is a Semitic language of the Afroasiatic language family. Culturally, is it considered by Jews and other religious groups as the language of the Jewish people, though other Jewish languages had originated among diaspora Jews, and the Hebrew language is also used by non-Jewish groups, such...

 preface of the first have been in great part preserved (see Harkavy

Harkavy

Harkavy is surname which may refer to:* Abraham Harkavy , historian* Alexander Harkavy , writer* Yehoshafat Harkabi military historian...

, "Studien," v. 39-59).