1
1839, in the meaning defined above
crypto- + -graph, after cryptography
Note: Popularized in Edgar Allan Poe's short story "The Gold Bug" (1843), though use of the word preceded Poe's story.
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More from Merriam-Webster on cryptograph
Rhyming Dictionary: Words that rhyme with cryptograph
Nglish: Translation of cryptograph for Spanish Speakers
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