What is xeno meaning?

The term "xeno" usually refers to something that is foreign or unfamiliar. It comes from the Greek word "xenos" which means stranger or guest. It is often used in scientific terminology to describe organisms or substances that are not indigenous to a particular environment, for example, xenobiotics are synthetic substances foreign to the body. Xeno- can also be a prefix in words such as xenophobia (fear or hatred of foreigners) and xenotransplantation (the transfer of organs or tissues between different species).