Which medical term denotes the collection of membranes covering the brain and spinal cord?

The correct term that signifies the collection of membranes covering the brain and spinal cord is "Mening/o." This term derives from "meninges," which refers to the three protective membranes—dura mater, arachnoid mater, and pia mater—that enclose the brain and spinal cord. These membranes play a crucial role in protecting the central nervous system, providing both structural support and an additional layer of defense against infection and injury.

The other terms listed do not relate to the membranes of the brain and spinal cord. "Metr/o" pertains to the uterus or measurement, making it relevant in contexts related to gynecology or metrics. "Melan/o" refers to dark pigmentation, primarily associated with melanin and conditions related to skin color or melanin-producing cells. "Mineral/o" refers to minerals, typically in relation to nutrition and biochemistry, but it does not connect to the neuroanatomical structures in question.

The clarity of the term "Mening/o" is essential for understanding medical terminology specifically related to neurology, allowing healthcare professionals to communicate effectively about conditions and treatments involving the protective coverings of the brain and spinal cord.