The Collaborative International Dictionary
Vibratiuncle
Vibratiuncle \Vi*bra"ti*un`cle\, a. [Dim. of vibration.]
A small vibration. [R.]
--Chambers.
Wiktionary
vibratiuncle
n. 1 A minuscule or slight vibration. 2 (context specifically historical English) A minute vibration in brain tissue caused by the comparatively greater vibrations of the particles of the medullary substance of the nerves (formerly hypothesised to convey external impressions to the mind), corresponding to idea of sensation and believed to account for memory.