axon Syllabification: (ax·on)Pronunciation: /ˈakˌsän/Definition of axon noun the long threadlike part of a nerve cell along which impulses are conducted from the cell body to other cells. Derivatives axonalPronunciation: /ˈaksənl, akˈsänl/ adjective Origin: mid 19th century (denoting the body axis): from Greek axōn 'axis'axon in other Oxford dictionaries Definition of axon in the British & World English dictionary