“Xeno” = foreign
“Estrogen” = a chemical compound acting as or like a female sex hormone
Xenoestrogens are often endocrine disruptors, meaning those chemicals are able to disturb the natural hormone balance, which can lead to abnormal sexual development and fertility disorders. You can find them in many places – they can be of both synthetic or natural origin.
Since interactions between different food-derived xenoestrogens are part of my professional research portfolio, I wrote a dedicated series of posts on them:
Hormones in Plastics – June 2018