This book is truly an encyclopedia encompassing various sciences and arts, presenting the conventional terminology used across different fields. The author adopts a scientific approach characterized by precision and clarity in his explanations and commentary. He begins by defining each term's linguistic meaning, sometimes in both Arabic and Persian, then proceeds to review scholarly articles on the subject, engaging in discussion, critical examination, and refutation with evidence where necessary. The work is alphabetically arranged and includes significant annotations and comments.

• Author: Muhammad al-Tahanawi
• Editor: Ahmed Hassan Basaj
• Publisher: Dar Al-Kotob Al-Ilmiyah - Beirut
• Year of Publication: 2006
• Number of Parts: 4
• Binding Type: Hardcover