The Collaborative International Dictionary
pachydermia
pachydermia \pach`y*der"mi*a\ (p[a^]k`[i^]*d[~e]r"m[i^]*[.a][i^]s), n. (Med.) Same as pachyderma.
Syn: pachydermatosis, pachyderma, nevoid elephantiasis.
Wiktionary
pachydermia
n. 1 (context medicine English) elephantiasis. 2 (context medicine English) Increased resistance of the red cells in anemia.
Wikipedia
Pachydermia (gastropod)
Pachydermia is a genus of sea snails, marine gastropod mollusks in the family Peltospiridae.