Cryogenics scale, both of which measure from absolute zero, rather than more usual scales such as Celsius or Fahrenheit, with their zeroes at arbitrary temperatures. The word "cryogenics" stems from Greek "κρύο (cryo)" – "cold" + "γονική (genic)" – "having to do with production". Cryogenic fluids with their boiling point in Kelvin Liquefied gases, such as liquid nitrogen and liquid helium, are used in many cryogenic applications. Liquid nitrogen is the most commonly used element in cryogenics and is legally purchasable around the world. Liquid helium is also commonly used and allows for the lowest attainable temperatures to be reached. These
English prefix anglicized neo-classical English words such as "deceive" are not analyzed by Marchand as being composed of a prefix "de-" and a bound base "-ceive" but are rather analyzed as being composed of a single morpheme (although the Latin sources of these English words are analyzed as such, as Latin words in the Latin language). However, not all foreign words are unanalyzable according to an English basis: some foreign elements have become a part of productive English word-formation processes. An example of such a now native English prefix is "co-" as in "co-worker", which is ultimately derived from the Latin prefix