Of or pertaining to something that originates from an external source or is produced by other organisms.
From Greek 'allo-' (other) + 'thogenic' (producing) + '-ous' (characterized by). Like allothigenous, this adds the '-ous' suffix to emphasize the quality of external origin. Both forms are used similarly in scientific contexts.
The '-ous' ending makes allothogenous sound like it's 'full of otherness'—and that's exactly right! Mountain soil is allothogenous to a valley floor that received it from erosion, and your microbiome is mostly allothogenous creatures, not you!
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