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• crypto
  crypto

  noun

  a person who secretly supports or adheres to a group, party, or belief.
• crypto-
  crypto-

  a combining form meaning “hidden,” “secret,” used in the formation of compound words.

crypto

¹ American  

[krip-toh] / ˈkrɪp toʊ /

noun

plural

cryptos

1. a person who secretly supports or adheres to a group, party, or belief.

2. cryptocurrency.

3. cryptography.

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adjective

1. secret or hidden; not publicly admitted.

   a crypto Nazi.

crypto- ² American  

1. a combining form meaning “hidden,” “secret,” used in the formation of compound words.

   cryptograph.

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crypto- British  

combining form

1. secret, hidden, or concealed

   cryptography

   crypto-fascist

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Usage

What does crypto- mean? Crypto- is a combining form used like a prefix meaning “hidden, secret.” It is used in many scientific, medical, and other technical terms. Crypto- comes from the Greek kryptós, meaning “hidden.” The word crypt also derives from this root. Dig up the connection at our entry for the word. In anatomy, crypto- specifically refers to a crypt in its specialized sense of a “slender pit or recess” or a “small glandular cavity.”What are variants of crypto-?When combined with words or word elements that begin with a vowel, crypto- becomes crypt-, as in cryptitis.

Etymology

Origin of crypto¹

First recorded in 1945–50; probably independent use of crypto-; cf. -o

Origin of crypto-²

Combining form representing Greek kryptós hidden. See crypt

Example Sentences

He also told police "El" offered to send money by PayPal or crypto but he did not have a crypto account and he was never paid.

From BBC • Apr. 30, 2026

In testifying against Halem, the teen, who was sworn in to testify just under his first name, Daniel, revealed a subculture around newly created crypto wealth.

From Los Angeles Times • Apr. 29, 2026

The slowdown in crypto trading volume also has been showing up in bitcoin exchange-traded funds, which were supposed to make the asset easier to trade through traditional brokerage accounts.

From MarketWatch • Apr. 29, 2026

For many crypto purists, the move is a violation of the “code is law” doctrine, the belief that blockchain transactions should be immutable and beyond the reach of human authority.

From The Wall Street Journal • Apr. 29, 2026

“After university I went straight to work as a crypto math researcher at the Doughnut,” she said.

From "City Spies" by James Ponti