onychophoranPronunciation: /ˌɒnɪˈkɒf(ə)rən/ ZoologyDefinition of onychophoran noun a terrestrial invertebrate of the small phylum Onychophora, which comprises the velvet worms. adjective relating to or denoting onychophorans. onychophoran in other Oxford dictionaries Definition of onychophoran in the US English dictionary