definitive host

Save This Word!

noun Zoology.

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



Apostrophes can be tricky; prove you know the difference between it’s and its in this crafty quiz!
Question 1 of 12
On the farm, the feed for chicks is significantly different from the roosters’; ______ not even comparable.

Origin of definitive host

First recorded in 1900–05
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

Medical definitions for definitive host

definitive host
[ dĭ-fĭnĭ-tĭv ]


A host in which a parasite develops to an adult or sexually mature stage.final host
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Scientific definitions for definitive host

definitive host
[ dĭ-fĭnĭ-tĭv ]

See under host.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
What's This Word?