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[krip-toh] /ˈkrɪp toʊ/
noun, plural cryptos.
a person who secretly supports or adheres to a group, party, or belief.
secret or hidden; not publicly admitted:
a crypto Nazi.
Origin of crypto
1945-50; probably independent use of crypto-; cf. -o


a combining form meaning “hidden,” “secret,” used in the formation of compound words:
Also, especially before a vowel, crypt-.
combining form representing Greek kryptós hidden. See crypt Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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Examples from the Web for crypto
Contemporary Examples
Historical Examples
  • It used to be that crypto people tried to keep all of this a secret.

    Little Brother

    Cory Doctorow
  • "Well, there's tons of crypto code for free online, of course," Jolu said.

    Little Brother

    Cory Doctorow
  • There's only one kind of crypto that anyone uses: crypto that's public, open and can be deployed by anyone.

    Little Brother

    Cory Doctorow
  • There are four parts to any crypto message: the original message, called the "cleartext."

    Little Brother

    Cory Doctorow
  • So I knew that crypto would keep me safe from eavesdroppers, but I wasn't ready to deal with histograms.

    Little Brother

    Cory Doctorow
  • You can't tell who's passing Xnet packets by looking at the contents of those packets, thanks to crypto.

    Little Brother

    Cory Doctorow
  • Bernstein had written a crypto tutorial that contained computer code that could be used to make a cipher stronger than DES-56.

    Little Brother

    Cory Doctorow
British Dictionary definitions for crypto


combining form
secret, hidden, or concealed: cryptography, crypto-fascist
Word Origin
New Latin, from Greek kruptos hidden, from kruptein to hide
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for crypto


before vowels crypt-, word-forming element meaning "secret" or "hidden," used in forming English words since at least 1760, from Latinized form of Greek kryptos "hidden, concealed, secret" (see crypt; the Greek comb. form was krypho-). Crypto-fascist is attested from 1937; crypto-communist from 1946.

Online Etymology Dictionary, © 2010 Douglas Harper
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crypto in Medicine

crypto- or crypt-

  1. Crypt: cryptectomy.

  2. Hidden; secret: cryptogenic.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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