Cushing's syndrome is the result of the excessive production of corticosteroids by the adrenal glands. An overproduction of corticotropin (ACTH) - the hormone that controls the adrenal gland - by the pituitary gland, which stimulates the adrenal glands to produce corticosteroids, may be one cause. It is called Cushing's disease and the result of ACTH-secreting pituitary adenoma. Alt.
deficiency. a lack or shortage; a condition characterized by the presence of less than the normal or necessary supply or competence. color vision deficiency see color vision deficiency.
Learner's definition of DEFECTIVE. [more defective; most defective] : having a problem or fault that prevents something from working correctly : having a defect or flaw. Our car had defective [=faulty] brakes, so we had them replaced. This computer is defective.