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 (ĕn′dō-sĭm′bē-ō′sĭs, -bī-)
A symbiotic association in which one or more organisms live inside another, such as bacteria in human intestines.

en′do·sym′bi·ot′ic (-ŏt′ĭk) adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(Botany) a type of symbiosis in which one organism lives inside the other, the two typically behaving as a single organism. It is believed to be the means by which such organelles as mitochondria and chloroplasts arose within eukaryotic cells
ˌendoˌsymbiˈotic adj
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˌɛn doʊˌsɪm biˈoʊ sɪs, -baɪ-)

symbiosis in which one symbiont lives within the body of the other.
en`do•sym′bi•ont (-ˌɒnt)
en`do•sym`bi•ot′ic (-ˈɒt ɪk) adj.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
References in periodicals archive ?
Perhaps the process of endosymbiosis in which prokaryotes became incorporated into other eukaryotic cells is an early form of holobionts.
1809 supports a single origin for xylotrophy (wood feeding) and xylotrophic bacterial endosymbiosis in Bivalvia.
In the family Aphididae, several diets have already been developed and used in toxicological, physiological, and behavioral research, as well as in studies of endosymbiosis, virus transmission, mortality, and nutrition (Hunter & Hsu 1999).
These associations in ecosystems are influenced by the relationships among organic and inorganic nutrients, hydric relationships, and the carbon cycle in plants, as well as the edaphic conditions, such as the chemical composition, humidity, temperature, pH, cation exchange capacity, and biotic and abiotic factors [22], and can affect plant endosymbiosis and AMF.
This process of endosymbiosis, marking the birth of mitochondria, changed the course of evolution [3] (reviewed in [4]).
However, there is little information as to how free-living autonomous bacteria became semi-autonomous organelles during endosymbiosis in early eukaryotic evolution.
Meanwhile, Johnson joined WHOI in 2009, where he has conducted research on protozoa that steal chloroplasts and other organelles for their own use (a phenomenon known as kleptoplasty) and algae that continue to live inside other organisms (a phenomenon called endosymbiosis).
Archibald, "Endosymbiosis and eukaryotic cell evolution," Current Biology, vol.
Gupta, "Origin of diderm (Gram-negative) bacteria: antibiotic selection pressure rather than endosymbiosis likely led to the evolution of bacterial cells with two membranes," Antonie van Leeuwenhoek, vol.