| beluga | (noun) valuable source of caviar and isinglass; found in Black and Caspian seas | Synonyms: Acipenser huso, hausen, white sturgeon |
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| (noun) small northern whale that is white when adult | Synonyms: Delphinapterus leucas, white whale |
| massasauga | (noun) pygmy rattlesnake found in moist areas from the Great Lakes to Mexico; feeds on mice and small amphibians | Synonyms: massasauga rattler, Sistrurus catenatus |
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| (noun) small pygmy rattlesnake | Synonyms: ground rattler, Sistrurus miliaris |
| ruga | (noun) (anatomy) a fold or wrinkle or crease | - |
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| yuga | (noun) the name of an epoch or era within a four age cycle in Hindu philosophy. | - |
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