substance abuse disorder n.
Any of a category of disorders in which pathological behavioral changes are associated with the regular use of substances that affect the central nervous system.
noun 1. that of which a thing consists; physical matter or material: form and substance. 2. a species of matter of definite chemical composition: a chalky substance. 3. controlled substance. 4. the subject matter of thought, discourse, study, etc. 5. the actual matter of a thing, as opposed to the appearance or shadow; reality. 6. […]
noun 1. a small peptide released upon stimulation in the nervous system and involved in regulation of the pain threshold. substance P n. A short-chain polypeptide that functions as a neurotransmitter especially in the transmission of pain impulses from peripheral receptors to the central nervous system.
adjective 1. below standard or less than adequate: substandard housing conditions. 2. noting or pertaining to a dialect or variety of a language or a feature of usage that is often considered by others to mark its user as uneducated; nonstandard. 3. Insurance. not measuring up to an insurer’s regular standards in undertaking risks: a […]