(also syn·es·the·sia ) / ˌsɪnəsˈθiːziə; NAmE -ˈθiːʒə/ noun
[ U ] ( biology ) the fact of experiencing some things in a different way from most other people, for example experiencing colours as sounds or shapes as tastes, or feeling sth in one part of the body when a different part is stimulated
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WORD ORIGIN
late 19th cent.: modern Latin , from syn- with , on the pattern of anaesthesia .