Originating from or produced by a different organism or external source; not native or inherent.
From Greek 'allo-' (other) + 'thigene' (produced) + '-ous' (full of/characterized by). This is another variant form emphasizing the external origin of substances or characteristics. The '-ous' suffix typically indicates quality or abundance in English.
Allothigenous is the adjective form that sounds the most like 'other-y'—it emphasizes that something fundamentally comes from somewhere else. Invasive species are allothigenous to their new habitat, and that's why they can cause so much trouble in ecosystems!
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