Definitions

1. noun

A rock or mineral that has been transported from its place of origin to a new location by natural forces, such as glaciers or rivers.

“The allochthons in the sedimentary rock formation suggested a complex geological history.”

2. noun

A plant or animal that has been introduced to a new region or ecosystem by human activity.

“The invasive allochthons in the local park were causing significant problems for native wildlife.”