† pachymenian. [ < pachy-comb. form + ancient Greek ὑμήν membrane (see hymenn.2) + -iasuffix1] MedicineObsoleterare abnormal thickening of the skin; pachydermia.Apparently only attested in dictionaries or glossaries.
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1857 R. G. MayneExpos. Lexicon Med. Sci. (1860) Pachymenicus, of or belonging to Pachymenia: pachymenic.