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cryogen a refrigerant capable of producing very low temperatures.
cryogenics (used with a sing. verb) the study of matter and energy at extremely low temperatures.
cryolite a white fluoride of sodium and aluminum, used in the production of aluminum.
cryometer a thermometer that measures very low temperatures by using alcohol instead of mercury.
cryonics (used with a sing. verb) the freezing of the body of someone who has just died for the purpose of storing it in anticipation of future resuscitation and cure.
cryophyte a plant, esp. certain algae or fungi, capable of growing in icy or snowy conditions.
cryopreservation the act or process of storing cells, tissues, organs, or other biological constructs at extremely low temperatures.
cryoscopy the scientific study of the freezing point of liquids, body fluids, or the like.
cryostat an apparatus that maintains samples at a constant, very low temperature.
cryosurgery a procedure in which diseased tissues are selectively destroyed by freezing them.
cryotherapy medical treatment by cold applications such as ice packs.
cry over spilled milk to worry unduly about something that cannot be undone.
cry over spilt milk to worry unduly about something that cannot be undone.
crypt a burial chamber or underground vault, esp. one beneath a church.
cryptanalysis the decoding of secret messages, esp. those employing ciphers and codes. [2 definitions]
cryptanalyst a specialist in decoding secret messages, esp. those employing ciphers and codes.
cryptic difficult to understand; ambiguous or mysterious in meaning. [3 definitions]
crypto- hidden; secret.
cryptogam any of the plants, such as ferns and algae, that bear no flowers or seeds, reproducing instead by spores.
cryptogram a message written so as to conceal its meaning by the use of a cipher or code. [2 definitions]
cryptography the science or art of creating and decoding secret messages, esp. those employing ciphers and codes. [2 definitions]