Extensum
Plural: Extensa
A word that I have taken to take the place of a blank space in the English language. Taken from Latin, meaning "Something extended", Extensum is a word brought in to describe the phenomenon that occurs when an object becomes so integrated into the body's neural-map that the item ceases to be considered as an external object to the body. An Extensum is unlike a tool, which is used and put down, instead the Extensum is processed by the brain to be akin to a semi-permanent or permanent biological feature. This is a phenomenon that most often occurs amongst those with visual impairment, as the wearing of a pair of glasses for potentially over a dozen hours in a day results in this phenomenon occurring at an advanced pace. For the wearer of the Extensum, the psychological barrier between the world and the body thus occurs at the boundary of the Extensum, rather than just the skin. An object that would cause phantom pain, such as a prosthetic, or sensory vulnerability, such as a pair of glasses/hearing aid, would be an Extensum. To someone with an Extensum, to be deprived of it is not an inconvenience, but a diminishing of their physical presence. The creation threshold for an Extensum is once the brain ceases to perceive the physical presence of the object consciously, and begins instead to perceive only the sensory data it provides (sight, sound, stability, etc).
A word that I have taken to take the place of a blank space in the English language. Taken from Latin, meaning "Something extended", Extensum is a word brought in to describe the phenomenon that occurs when an object becomes so integrated into the body's neural-map that the item ceases to be considered as an external object to the body. An Extensum is unlike a tool, which is used and put down, instead the Extensum is processed by the brain to be akin to a semi-permanent or permanent biological feature. This is a phenomenon that most often occurs amongst those with visual impairment, as the wearing of a pair of glasses for potentially over a dozen hours in a day results in this phenomenon occurring at an advanced pace. For the wearer of the Extensum, the psychological barrier between the world and the body thus occurs at the boundary of the Extensum, rather than just the skin. An object that would cause phantom pain, such as a prosthetic, or sensory vulnerability, such as a pair of glasses/hearing aid, would be an Extensum. To someone with an Extensum, to be deprived of it is not an inconvenience, but a diminishing of their physical presence. The creation threshold for an Extensum is once the brain ceases to perceive the physical presence of the object consciously, and begins instead to perceive only the sensory data it provides (sight, sound, stability, etc).
"He sat in the quiet room, the weight of his glasses and the seal of his headphones forming a familiar architecture around his senses; they were no longer equipment, but his primary extensum."
Extensum by DeepestThanDeepestThinker December 21, 2025
Urban Dictionary Merch