PACHYLOSIS
\pˌat͡ʃɪlˈə͡ʊsɪs], \pˌatʃɪlˈəʊsɪs], \p_ˌa_tʃ_ɪ_l_ˈəʊ_s_ɪ_s]\
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By William R. Warner
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An inordinate production of the epidermis dependent upon hypertrophy of the papillae of the skin. -E. Wilson.
By Robley Dunglison