| cupronickel | (noun) a 60/40 alloy of copper and nickel | - |
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| mispickel | (noun) a silver-white or grey ore of arsenic | Synonyms: arsenopyrite |
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| nickel | (noun) a United States coin worth one twentieth of a dollar | - |
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| (noun) five dollars worth of a drug | Synonyms: nickel note |
| (noun) a hard malleable ductile silvery metallic element that is resistant to corrosion; used in alloys; occurs in pentlandite and smaltite and garnierite and millerite | Synonyms: atomic number 28, Ni |
| pumpernickel | (noun) bread made of coarse rye flour | Synonyms: black bread |
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| schnorkel | (noun) air passage provided by a retractable device containing intake and exhaust pipes; permits a submarine to stay submerged for extended periods of time | Synonyms: breather, schnorchel, snorkel, snorkel breather |
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| seckel | (noun) small yellowish- to reddish-brown pear | Synonyms: seckel pear |
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| shekel | (noun) the basic unit of money in Israel | - |
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| snorkel | (noun) air passage provided by a retractable device containing intake and exhaust pipes; permits a submarine to stay submerged for extended periods of time | Synonyms: breather, schnorchel, schnorkel, snorkel breather |
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| (noun) breathing device consisting of a bent tube fitting into a swimmer's mouth and extending above the surface; allows swimmer to breathe while face down in the water | - |
| yokel | (noun) a person who is not very intelligent or interested in culture | Synonyms: bumpkin, chawbacon, hayseed, hick, rube, yahoo |
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