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“more argilloferruginous”
argillo-ferruginous, argilloferruginous (adjective); more argillo-ferruginous, most argillo-ferruginous; more argilloferruginous, most argilloferruginous
Pertaining to something that contains clay and iron: One of the minerals that Bill studied in class was of an argillo-ferruginous nature which consisted of iron and clay.
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argill-, argillo- +
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