from The Century Dictionary and Cyclopedia
- n. A name of the loggerhead turtle, Thalassochelys caretta or T. caouana.
Sorry, no etymologies found.
Cassidy offered an intriguing explanation: the metaphor probably originated in Caribbean folklore, which has it that sea turtles (the referent for caouane in standard French dictionaries) copulate for a hundred days at a time.
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