What is "obdormition"

Obdormition \Ob"dor*mi"tion\, n. [L. obdormire to fall asleep.] Sleep. [Obs.]
--Bp. Hall.

n. The sensation of numbness that occurs in a limb when it "falls asleep" due to pressure on a nerve.

Obdormition (; from Latin obdormire "to fall asleep") is a medical term describing numbness in a limb, often caused by constant pressure on nerves or lack of movement. This is colloquially referred to as the limb "going to sleep," and usually followed by paresthesia, colloquially called "pins and needles". Besides being the result of a limb "going to sleep," it is also a common symptom of a brain tumor.