What condition is referred to as sleepwalking?

The condition referred to as sleepwalking is known as somnambulism. This term is derived from Latin, where "somnus" means sleep and "ambulare" means to walk. Individuals experiencing somnambulism typically engage in activities while they are asleep, which can include walking, talking, or performing other tasks, all while remaining largely unaware of their surroundings.

The other terms listed relate to different concepts: somniloquist describes someone who talks in their sleep, sphacelation refers to the death of tissue (particularly in medical contexts), and speriferous means bearing or carrying seeds, none of which are associated with the act of walking during sleep. Thus, somnambulism is the precise term that accurately captures the phenomenon of sleepwalking.