substantia gelatinosa

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sub·stan·ti·a ge·lat·i·no·sa

 (səb-stăn′shē-ə jə-lăt′n-ō′sə)
n.
A narrow, dense, vertical band of gray matter forming the dorsal part of the posterior column of the spinal cord whose gelatinous appearance is due to its very low content of myelinated nerve fibers. It functions in the integration of sensory stimuli that give rise to the sensations of heat and pain.

[New Latin substantia gelatinōsa : Latin substantia, substance + New Latin gelatinōsus, gelatinous.]
References in periodicals archive ?
When the work is shown, Lamer typically charges the curator or another responsible party with gathering the namesake ingredients--procuring a cattleya in New York in springtime is not necessarily an easy task--and boiling the agar, a gelatinous substance used to support bacterial growth.
Perhaps more useful items, if a little gross, are disposable bags that turn urine-- or any liquid -- into a gelatinous substance.
This industry expanded enormously during World War II, mainly to replace agar, a gelatinous substance derived from the cell walls of certain red algae, which is used as a vegetarian substitute for gelatin.
The shower curtain had an unidentified gelatinous substance, the air conditioner wasn't working and being held up by tape, there was a big hole in the wall, the sheets weren't cleaned.