antidromicPronunciation: /ˌantɪˈdrəʊmɪk/Definition of antidromic adjective Physiology (of an impulse) travelling in the opposite direction to that normal in a nerve fibre. The opposite of orthodromic.Origin: early 20th century: from anti- + Greek dromos 'running' + -icantidromic in other Oxford dictionaries Definition of antidromic in the US English dictionary