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| having a backbone or spinal column |
| phylum of radially symmetrical coelomate marine invertabrates |
definitive host de·fin·i·tive host (dĭ-fĭn'ĭ-tĭv)
n.
A host in which a parasite develops to an adult or sexually mature stage. Also called final host.
| definitive host (dĭ-fĭn'ĭ-tĭv) Pronunciation Key
See under host. |