This article explores the "Golden Age" of Arabic linguistics during the Abbasid Caliphate (750–1258). It examines the evolution of the Arabic language from a literary medium into a universal language of science. The research focuses on the scholarly rivalry between the Basra and Kufa grammatical schools, specifically analyzing the methodological debates regarding qiyas (analogy) and sam' (auditory transmission). The fundamental contributions of Sibawayh’s Al-Kitab and Al-Khalil ibn Ahmad’s Kitab al-Ayn in systematizing Arabic syntax, phonetics, and lexicography are discussed in detail. Furthermore, the article evaluates the impact of the Translation Movement at the House of Wisdom (Bayt al-Hikma), highlighting how the integration of Greek, Persian, and Indian scholarship enriched Arabic vocabulary and established a comprehensive scientific terminology.