Rudraksha word is related to Hindu Religion. Rudraksha tree and seed both are called Rudraksha. In Sanskrit Rudraksham means Rudraksha fruit as well as Rudraksha tree. Rudraksha tree grows on mountains and hilly region of Nepal, Indonesia, Java, Sumatra and Burma. Its leaves are green in colour and the fruits are brown in color and sour in taste. The Rudraksha fruits also adorn the human beings because of spiritual values.
Found in Ancient Indian Scriptures and texts: From ancient times, the power of Holy Rudraksha beads have been scripted in various religious texts like ShivmahaPurana, Shreemaddevibhagwat, Padma Purana, ling Purana, Ashtamalikopnishad, Nirnayasindhoo, Mantramaharnava, Mahakaal Sanmhita, Rudrakshajabalopnishad, Vrihajjabalopnishad, Shivaswarodaya and Sarvollastantra.
As per ancient Indian scriptures mentioned above Rudraksha is evolved from the eyes of Lord Shiva hence, it's called Rudraksha. Rudra means Shiva and Aksha means eyes. Aksha also means a group of alphabets in Sanskrit called Varna). As per details found in Halayudh Kosha(Ancient Scripture) letters from A to ksha that is 51 letters are called Aksha . Therefore, Rudraksha can be called as a seed in which a group of Sanskrit letters called Varna reside.