I. ˈkrip-(ˌ)tō noun
( plural cryptos )
Etymology: crypt-
Date: 1946
1. : a person who adheres or belongs secretly to a party, sect, or other group
2. : cryptography 2
II. adjective
Date: 1681
1. : not openly avowed or declared — often used in combination
crypto -fascist
2. : cryptographic