(slang, derogatory) Stupid.

Alternative form of retardancy

(slang, vulgar, offensive) The extreme physical power often displayed by those with cognitive disabilities as a result of decreased inhibition against using their full strength.

plural of vapor retarder

A chemical used to impart flame resistance.

A layer of material or a laminate used to appreciably reduce the flow of water vapor into a roof assembly.

plural of fire retardant

(psychology, dated) A developmental disability in which the person has a very low intelligence quotient, usually below 70, plus difficulty in multiple areas of daily life. Evidence of this disability must have appeared before the person reached adulthood for diagnosis.

Hard to ignite; not flammable.

A substance that makes an object resistant to burning.