definitive host

definitive host

noun Zoology.
the host in or on which a parasite spends the sexual stage of its life cycle.

Origin:
1900–05
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Definitive host is always a great word to know.
So is echinodermata. Does it mean:
having a backbone or spinal column
phylum of radially symmetrical coelomate marine invertabrates
American Heritage
Medical Dictionary

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.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
definitive host   (dĭ-fĭn'ĭ-tĭv)  Pronunciation Key 
See under host.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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