earball

/ (ˈɪərˌbɔːl) /

noun

(in acupressure) a small ball kept in position in the ear and pressed when needed to relieve stress
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012