pachyderm

UK: /ˈpækidɜː^rm/ US: /ˈpækɪˌdɝm/ ,(pak′i dûrm′)

WordReference Random House Learner's Dictionary of American English © 2025

pach•y•derm /ˈpækɪˌdɜrm/   n. [countable]

1. Mammals a large, thick-skinned mammal with hoofs, as the elephant, hippopotamus, or rhinoceros.

See -derm-.

WordReference Random House Unabridged Dictionary of American English © 2025

pach•y•derm  (pak′i dûrm′), n. 

1. Mammals any of the thick-skinned, nonruminant ungulates, as the elephant, hippopotamus, and rhinoceros.
2. Mammals an elephant.
3. a person who is not sensitive to criticism, ridicule, etc.;
   a thick-skinned person.

• Greek pachý(s) thick + -dérmata, neuter plural of -dermatos -skinned, adjective, adjectival derivative of dermat-, stem of dérma skin, derma¹
• Neo-Latin Pachyderma, assumed singular of Pachydermata (plural) obsolete order name
• 1830–40

pach′y•der′mal, pach′y•der′mous, pach′y•der′mic, pach′y•der′moid, adj. 

Collins Concise English Dictionary © HarperCollins Publishers::

pachyderm / ˈpækɪˌdɜːm/ noun

1. any very large thick-skinned mammal, such as an elephant, rhinoceros, or hippopotamus

Etymology: 19th Century: from French pachyderme, from Greek pakhudermos thick-skinned, from pakhus thick + derma skin

ˌpachyˈdermatous, ˌpachyˈdermal adjective