The word Rudraksha has been derived from the two Sanskrit words "Rudra" and "Aksha" which means Lord Shiva and Teardrops respectively. As per "Shiva Purana", Lord Shiva, for the well being of all living beings, went into deep meditation once. It is said that tear drops fell on the Earth when he opened his eyes. Taking the form of seeds, these tear drops became the Rudraksha tree later on.
The botanical name of the holy Rudraksha tree is 'Elaeocarpus ganitrus Roxb' belonging to the family Tiliaceae. It grows abundantly and naturally in subtropical and tropical areas. You can find these trees in Nepal, in some parts of India, in the Himalayan region, Malaysia and Indonesia.