definitive host

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

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On the farm, the feed for chicks is significantly different from the roosters’; ______ not even comparable.

First recorded in 1900–05

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

When we had that meeting in the Caribbean, Jeffrey was holding his own and not only was he a pleasant host, he was pleasant guy.
Sleazy Billionaire’s Double Life Featured Beach Parties With Stephen Hawking|M.L. Nestel|January 8, 2015|DAILY BEAST
Kyle Dietrich, 36, is a host of one of the DC Dinner Parties.
Everyone at This Dinner Party Has Lost Someone|Samantha Levine|January 6, 2015|DAILY BEAST
At his Tucson hacienda he is a gracious host and a good neighbor.
The Story Behind Lee Marvin’s Liberty Valance Smile|Robert Ward|January 3, 2015|DAILY BEAST
Earlier in the segment, host Chuck Todd had asked him if he understood and acknowledged that black people have a fear of police.
Memo to Cops: Criticisms Aren’t Attacks|Michael Tomasky|December 28, 2014|DAILY BEAST

NBC News boss Deborah Turness abruptly ousted the ‘Meet the Press’ host four months ago.
David Gregory's 'Meet the Press' Eviction Exposed in Washingtonian Takedown|Lloyd Grove|December 23, 2014|DAILY BEAST
And with that the host gave him such a kick as sent him howling into the street, amidst the roars of the company.
The Book of Anecdotes and Budget of Fun;|Various
My self-appointed host, whose name was Goodell, waved me to a chair, and took one opposite.
Raw Gold|Bertrand W. Sinclair
Everybody was sorry to go when they left, and their host regretted the departure of his visitors.
The Pit Town Coronet, Volume I (of 3)|Charles James Wills
There was a host of friends and acquaintances around the little home, making merry and admiring the baby.
Alila, Our Little Philippine Cousin|Mary Hazelton Wade
Elmer Spiker, mine host of the inn, was huddled close to the stove, and was reading by the light of a lamp.
The Soldier of the Valley|Nelson Lloyd

definitive host

[ dĭ-fĭn′ĭ-tĭv ]

A host in which a parasite develops to an adult or sexually mature stage.final host

definitive host

[ dĭ-fĭn′ĭ-tĭv ]

See under host.