artiodactyl mammal ar·tio·dac·tylmammal uncommon noun 1. placental mammal having hooves with an even number of functional toes on each foot Synonymseven-toed ungulateartiodactylartiodactyl mammal Antonymsodd-toed ungulate Related words Broader terms ungulate Narrower terms swinepeccaryhippopotamusruminantcamelllamavicuna Parts Artiodactyla WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.