in taxon neuron projection development axon development GO:0061564 biological_process The progression of an axon over time. Covers axonogenesis (de novo generation of an axon) and axon regeneration (regrowth), as well as processes pertaining to the progression of the axon over time (fasciculation and defasciculation). dph 2013-07-18T14:43:01Z Eumetazoa