Etymology
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*der- 

Proto-Indo-European root meaning "to split, flay, peel," with derivatives referring to skin and leather.

It forms all or part of: derm; -derm; derma; dermal; dermato-; dermatology; echinoderm; epidermis; hypodermic; pachyderm; scleroderma; taxidermy; tart (adj.) "having a sharp taste;" tear (v.1) "pull apart;" tetter; turd.

It is the hypothetical source of/evidence for its existence is provided by: Sanskrit drnati "cleaves, bursts;" Greek derein "to flay;" Armenian terem "I flay;" Old Church Slavonic dera "to burst asunder;" Breton darn "piece;" Old English teran "to tear, lacerate."

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Dobermann pinscher (n.)

breed of domestic dog, originally used in police work, 1911 (as pincher Dobermann from 1907), named for Ludwig Dobermann, 19c. German dog-breeder in Thuringia. Pinscher "fox terrier" seems to be a 19c. borrowing from English pinch (see Kluge).

Der Kutscher aus gutem Hause verschafft sich, wie er kann und wenn er kann, einen ganz kleinen englischen Pinscher, der den Pferden sehr gut gut folgt und die großen Dänen von ehedem ersetzt hat, aus J.J. Rousseau's Zeit, der von dem dänischen Hunde umgerannt wurde, wie ihr wißt. ["Paris, oder, Das Buch der Hundert und Ein," Volume 6, Theodor Hell (pseud.), Potsdam, 1833]
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tetter (n.)

skin disease, Old English teter, from a reduplicated form of PIE root *der- "to split, flay, peel."

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opium (n.)

"inspissated juice of the poppy plant," especially as used in medicine from 17c. for relief of pain and production of sleep, late 14c., from Latin opium, from Greek opion "poppy juice, poppy," diminutive of opos "vegetable juice, plant juice, fig curd," from PIE *sokwo- "juice, resin" (source also of Old Church Slavonic soki "juice," Lithuanian sakaī (plural) "resin").

Die Religion ist der Seufzer der bedrängten Kreatur, das Gemüth einer herzlosen Welt, wie sie der Geist geistloser Zustände ist. Sie ist das Opium des Volks. [Karl Marx, "Zur Kritik der Hegel'schen Rechts-Philosophie," in "Deutsch-Französische Jahrbücher," February, 1844]

The British Opium War against China lasted from 1839-42; the name is attested from 1841. Opium-eater, one who habitually uses opium in some form, is by 1821.

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derm (n.)

"the skin, the true skin, the derma," 1835, from Greek derma "skin, hide, leather," from PIE root *der- "to split, flay, peel," with derivatives referring to skin and leather.

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-derm 

word-forming element meaning "skin," from Greek derma "skin, hide, leather," from PIE root *der- "to split, flay, peel," with derivatives referring to skin and leather.

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Eurasia (n.)

1881, from Euro- + Asia. First record of it in any language seems to be in H. Reusche's "Handbuch der Geographie" (1858), but see Eurasian. Related: Eurasiatic (1863).

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epidermis (n.)

1620s, from Late Latin epidermis, from Greek epidermis "the outer skin," from epi "on" (see epi-) + derma "skin" (from PIE root *der- "to split, flay, peel," with derivatives referring to skin and leather). Related: Epidermal; epidermic.

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derma (n.)

"the true skin, the skin beneath the epidermis," 1706, from Modern Latin derma, from Greek derma (genitive dermatos) "(flayed) skin, leather," from PIE root *der- "to split, flay, peel," with derivatives referring to skin and leather.

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realpolitik (n.)

"politics driven by practical considerations" (rather than ideology or morals), 1914, from German Realpolitik (August Ludwig von Rochau, "Grundsätze der Realpolitik," 1853), which can be translated as "practical politics." See real (adj.) + politics.

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