Noun. 1. refrigerant-any substance used to provide cooling (as in a refrigerator). substance-a particular kind or species of matter with uniform properties; shigella is one of the most toxic substances known to man.cryogen-a liquid that boils at below -160 C and is used as a refrigerant.. A substance, such as air, ammonia, water, or carbon dioxide, used to provide cooling either as the working substance of a refrigerator or by direct absorption of heat. 2. Medicine An agent used to reduce fever.
usually offensive: a person affected with extreme mental retardation. 2. : a foolish or stupid person. â idiot adjective. See idiot defined for English-language learners.
Moron was coined in 1910 by psychologist Henry H. Goddard from the Ancient Greek word Î¼ÏÏÏÏ (moros), which meant dull (as opposed to oxy, which meant sharp (see also: oxymoron)), and used to describe a person with a mental age in adulthood of between 8 and 12 on the Binet scale.he word moron, along with others including, idiotic, imbecilic, stupid, and  feeble-minded , was formerly considered a valid descriptor in the psychological community, but it is now deprecated in use by psychologists.