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noun
Any of various nonvenomous rodent-eating snakes of North America and Asia.
is a specific kind of: colubrid, colubrid snake.
is a broader term that covers: corn snake, Elaphe guttata, red rat snake | black rat snake, blacksnake, Elaphe obsoleta, mountain blacksnake, pilot blacksnake | chicken snake | Indian rat snake, Ptyas mucosus.
Find more on rat snake elsewhere: etymology - rhymes - Wikipedia.
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