Pronounced: AHN-shou-uhng, noun
Notes: I think this is another word that I confused with another one
The word allochthonous means “not formed in the region of locate where something ultimately is located” – it is normally used of rocks or minerals.
This word came into English in the 1910s
Background / Comments
Our word was modeled after autochthonous, which has the opposite meaning (that is, formed in the region where found). Our word combines the prefix allo- (other) with chthṓn (the earth; land; ground).