onychophoran Syllabification: (on·y·choph·o·ran)Pronunciation: /ˌäniˈkäfərən/ ZoologyDefinition of onychophoran noun a terrestrial invertebrate of the small phylum Onychophora; a velvet worm. adjective relating to or denoting onychophorans. onychophoran in other Oxford dictionaries Definition of onychophoran in the British & World English dictionary