xenobiotics

/ˌzɛnəbaɪˈɑtɪks/
noun
  1. Chemical substances that are foreign to a living organism or to a natural environment; plural of xenobiotic.
    • Some xenobiotics can accumulate in the food chain and cause long-term harm.
    • Environmental agencies monitor xenobiotics in the air to protect public health.
    • The body uses enzymes in the liver to break down xenobiotics like drugs and alcohol.