- a host, other than the usual or primary host, on which a parasitic organism can sustain itself.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
- One of two species of host on which some pathogens, such as certain rust fungi, must develop to complete their life cycles.
- A species of host other than the principal host on which a parasite can survive.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.