z
zen
A Buddhist religious school which originated in China and then spread in Japan; through contemplation, its follows aim to identify the inner being in every object and experience, even the most humble.
Zeolite
The general name for a group of minerals consisting of hydrated aluminosilicates, with mobile ions (sodium, potassium, calcium), featuring a structure of rings consisting mainly of 4, 6, 8 or 12 tetrahedrae, with cavities and channels which have led to its use in the chemical industry (e.g. as molecular sieves or catalysts) | artificial zeolite, a synthetic material similar in structure to the natural equivalent, widely used in the chemical industry.