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crypto-[crypto- 词源字典]: 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.[crypto- etymology, crypto- origin, 英语词源]
cryptogram (n.): 1880, from crypto- + gram "word, letter." A modern word coined in English; though the elements are Greek, the ancient Greeks would find it barbarous.
cryptography (n.): 1650s, from French cryptographie or directly from Modern Latin cryptographia, from Greek kryptos "hidden" (see crypt) + -graphy. Related: Cryptograph; cryptographer.
cryptology (n.): 1640s, from crypto- + -ology.
cryptobranchiate: "Designating aquatic invertebrates with concealed gills, especially certain nudibranch molluscs that are able to completely retract their gills; of or relating to such invertebrates", Mid 19th cent.; earliest use found in Richard Owen (1804–1892), comparative anatomist and palaeontologist. From crypto- + -branchiate. With sense 1 compare French cryptobranche.
cryptogam: "A plant that has no true flowers or seeds, including ferns, mosses, liverworts, lichens, algae, and fungi", Mid 19th century: from French cryptogame, from modern Latin cryptogamae (plantae), denoting non-flowering plants, from Greek kruptos 'hidden' + gamos 'marriage' (because the means of reproduction was not apparent).
cryptosporidium: "A parasitic coccidian protozoan found in the intestinal tract of many vertebrates, where it sometimes causes disease", Early 20th century: from crypto- 'concealed' + modern Latin sporidium 'small spore'.
cryptoxanthin: "A yellow carotenoid pigment which is a metabolic precursor of vitamin A and is commonly found in plants and in other sources such as egg yolk", 1930s; earliest use found in Chemical Abstracts. From crypto- + xanthin, after German Kryptoxanthin.
cryptorchism: "= cryptorchidism", Mid 19th cent. From German Kryptorchismus, apparently shortened from Kryptorchidismus.
cryptonym: "A code name", Late 19th century: from crypto- 'hidden' + -onym.
cryptovolcanic: "Of a phenomenon or structure (especially a crater): apparently volcanic but occurring or formed in the absence of evident volcanic activity", Early 20th cent.; earliest use found in Nature: a weekly journal of science. From crypto- + volcanic, after German kryptovulkanisch.
cryptomeria: "A tall conical coniferous tree with long, curved, spirally arranged leaves and short cones. Native to China and Japan, it is grown for timber in Japan", Modern Latin, from crypto- 'hidden' + Greek meros 'part' (because the seeds are concealed by scales).