paraplegia

This term describes a specific medical condition of paralysis affecting the lower limbs and torso. It is distinct from quadriplegia, which involves all four limbs, and monoplegia, which affects only one. The word carries a clinical, diagnostic tone and is used primarily in medical reports or healthcare contexts to describe a permanent state of impairment. As a medical condition, it is treated as an uncountable noun. It does not have a plural form in standard usage because it refers to the state of the condition rather than individual instances of the disease.