pach·y·derm

[pak-i-durm]
noun
1.
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; < Neo-Latin Pachyderma, assumed singular of Pachydermata (plural) obsolete order name < Greek pachý(s) thick + -dérmata, neuter plural of -dermatos -skinned, adj. derivative of dermat-, stem of dérma skin, derma1

pach·y·der·mal, pach·y·der·mous, pach·y·der·mic, pach·y·der·moid, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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00:10
Pachyderm is always a great word to know.
So is gobo. Does it mean:
a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.
a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.
Collins
World English Dictionary
pachyderm (ˈpækɪˌdɜːm) [Click for IPA pronunciation guide]
 
n
any very large thick-skinned mammal, such as an elephant, rhinoceros, or hippopotamus
 
[C19: from French pachyderme, from Greek pakhudermos thick-skinned, from pakhus thick + derma skin]
 
pachy'dermatous
 
adj

Collins English Dictionary - Complete & Unabridged 10th Edition
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Etymonline
Word Origin & History

pachyderm
1838, from Fr. pachyderme (c.1600), adopted as a biological term 1797 by Fr. naturalist Georges Léopole Chrétien Frédéric Dagobert, Baron Cuvier (1769-1832), from Gk. pachydermos "thick-skinned," from pachys "thick" (from PIE *bhengh-, cf. Skt. bahu- "much") + derma "skin."
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Science Dictionary
pachyderm   (pāk'ĭ-dûrm')  Pronunciation Key 
Any of various large, thick-skinned mammals, such as the elephant, rhinoceros, or hippopotamus.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
The royal pachyderm is only one feature of this edition of the circus.
Some researchers are pointing to a species-wide trauma and the fraying of the fabric of pachyderm society.
So fans have begun camping out for hours to await the pachyderm procession.
What emerged was a portrait of pervasive pachyderm dysfunction.
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