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crypto-

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  1. a combining form meaning “hidden,” “secret,” used in the formation of compound words: cryptograph.
Also especially before a vowel, crypt-.

Origin of crypto-

combining form representing Greek kryptós hidden. See crypt
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for crypto-

crypto-

before a vowel crypt-

combining form
  1. secret, hidden, or concealedcryptography; 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

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

crypto- in Medicine

crypto-

pref.
  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.