Etymology
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cortical (adj.)

1670s, in botany, "belonging to external covering," from Modern Latin corticalis "resembling or consisting of bark or rind," from cortex (genitive corticis) "bark of a tree" (from PIE root *sker- (1) "to cut"). Also used in anatomy, applied to enveloping parts (distinguished from medullary).

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dentin (n.)

also dentine, the bone-like substance in teeth (as distinguished from enamel or pulp), 1836, from combining form of Latin dens (genitive dentis) "tooth" (from PIE root *dent- "tooth") + chemical suffix -in (2). Related: Dentinal.

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flatware (n.)
1851, from flat (adj.), which was used from late 14c. of plates, dishes, saucers in a sense "shallow; smooth-surfaced" + ware (n.). Originally as distinguished from hollow ware; U.S. sense of "domestic cutlery" recorded by 1895.
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smallpox (n.)
acute, highly contagious disease, 1510s, small pokkes, as distinguished from great pox "syphilis;" from small-pock "pustule caused by smallpox" (mid-15c.); see small (adj.) + pox. Compare French petite vérole. Fatal in a quarter to a third of unvaccinated cases.
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longbow (n.)
also long-bow, the bow of war and chase in medieval Europe and the characteristic weapon of the English soldiery, only gradually superseded by firearms; late 14c., from long (adj.) + bow (n.1). Distinguished from the crossbow, but especially of bows five feet or longer.
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levulose (n.)

old name of the sugar isomeric with dextrose but distinguished from it by turning the plane of polarization to the left, 1865 (1864 in German) from Latin laevus "left" (from PIE *laiwo- "left;" see left (adj.)) + sugar ending -ose (2). 

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practician (n.)

"a practitioner; one who practices (as distinguished from one who theorizes," originally also practitian, c. 1500, from Old French practicien (Modern French praticien), from Late Latin practicus "fit for action," (see practice (v.)). An earlier word was practisour (late 14c.).

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diva (n.)

"distinguished woman singer, prima donna," 1864, from Italian diva "goddess, fine lady," from Latin diva "goddess," fem. of divus "a god, divine (one)," related to deus "god, deity" (from PIE root *dyeu- "to shine," in derivatives "sky, heaven, god").

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landwehr (n.)

military reserves of Germany, Austria, or Switzerland, 1815, from German Landwehr, from Old High German lantweri, from lant "land" (see land (n.)) + weri "protection," from PIE root *wer- (4) "to cover." As distinguished from the militia, the Landsturm, with sturm "alarm; storm" (see storm (n.)).

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Samnite (n.)

member of an ancient people (an offshoot of the Sabines) who inhabited Samnium in Italy, late 14c., from Latin Samnites (plural), from Samnium, which probably is related to Sabine (q.v.). The class of gladiators (distinguished by their oblong shield) was so-called because they were armed like the natives of Samnium.

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