end bulb

noun

, Anatomy.

any of various types of oval or rounded structures occurring at the ends of nerve fibers, ranging from slight enlargements to complex corpuscles that act as sensory receptors for pain, touch, cold, etc.

There is the rather similar "cylindrical end-bulb" believed to be the sense organ for warmth.

The nerves of sensibility have a peculiarly sensitive arrangement spread under the skin, constituting an end-bulb or touch organ.

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