| alundum | (noun) a substance made of fused alumina | - |
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| barunduki | (noun) terrestrial Siberian squirrel | Synonyms: baranduki, baronduki, burunduki, Eutamius asiaticus, Eutamius sibiricus |
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| burunduki | (noun) terrestrial Siberian squirrel | Synonyms: baranduki, baronduki, barunduki, Eutamius asiaticus, Eutamius sibiricus |
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| carborundum | (noun) an abrasive composed of silicon carbide crystals | - |
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| corundum | (noun) very hard mineral used as an abrasive | Synonyms: corundom |
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| fundus | (noun) (anatomy) the base of a hollow organ or that part of the organ farthest from its opening | - |
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| roundup | (noun) the systematic gathering up of suspects by the police | - |
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| (noun) the activity of gathering livestock together so that they can be counted or branded or sold | - |
| (noun) a summary list; as in e.g. "a news roundup" | - |
| undulation | (noun) (physics) a movement up and down or back and forth | Synonyms: wave |
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| (noun) wavelike motion; a gentle rising and falling in the manner of waves | - |
| (noun) an undulating curve | Synonyms: wave |
| undutifulness | (noun) impiety characterized by lack of devotion to duty | - |
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