alternate host

American  

noun

Ecology.

1. a host, other than the usual or primary host, on which a parasitic organism can sustain itself.

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alternate host Scientific  

1. One of two species of host on which some pathogens, such as certain rust fungi, must develop to complete their life cycles.

2. A species of host other than the principal host on which a parasite can survive.

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Example Sentences

This is an essential part of the insect’s life equation — the alternate host plant for the overwintering generation.

From Seattle Times

The summits, which alternate host countries each year, are seen as particularly useful because of the close, private proximity of the small group of leaders and their staffs.

From Washington Post

Olympic Committee is searching for an alternate host city for the 2024 Summer Games after deciding Monday not to nominate Boston, where persistent opposition proved fatal.

From The Wall Street Journal

Alonso, 21 points behind Vettel after eight of 19 races, was able to take to the track normally second time around and was sixth quickest as he targets a first front row on the grid since the German Grand Prix at alternate host Hockenheim last year.

From Reuters