Final answer:
The term that describes a classification system not utilized in DSM-V but remains relevant in understanding disorders is Multi-axial classification.
Step-by-step explanation:
The term that describes a classification system not utilized in DSM-V but remains relevant in understanding disorders is Multi-axial classification. The DSM-V (Diagnostic and Statistical Manual of Mental Disorders, 5th edition) does not use the multi-axial system anymore, but it was utilized in previous editions. The multi-axial classification system allowed for a comprehensive assessment of a person's mental health by including multiple axes or dimensions to consider different aspects of a disorder.