any of the thick-skinned, nonruminant ungulates, as the elephant, hippopotamus, and rhinoceros.
2.
an elephant.
3.
a person who is not sensitive to criticism, ridicule, etc.; a thick-skinned person.
Origin: 1830–40; < NL Pachyderma, assumed sing. of Pachydermata (pl.) obs. order name < Gk pachý(s) thick + -dérmata, neut. pl. of -dermatos -skinned, adj. deriv. of dermat-, s. of dérma skin, derma1
pach·y·derm (pāk'ĭ-dûrm') n. Any of various large, thick-skinned, hoofed mammals such as the elephant, rhinoceros, or hippopotamus.
[French pachyderme, from New Latin *Pachyderma, sing. of Pachydermata, obsolete order name, from Greek pakhudermos, thick-skinned : pakhus, thick + derma, skin; see derma1.] pach'y·der'mal, pach'y·der'mic, pach'y·der'mous adj.
1838, from Fr. pachyderme (c.1600), adopted as a biological term 1797 by Cuvier, from Gk. pachydermos "thick-skinned," from pachys "thick" (from PIE *bhengh-, cf. Skt. bahu- "much") + derma "skin."