Also found in: Medical, Encyclopedia, Wikipedia.


 (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.


(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


(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.
References in periodicals archive ?
Induction of gametogenesis in the cnidarian endosymbiosis model Aiptasia sp.
However, there is little information as to how free-living autonomous bacteria became semi-autonomous organelles during endosymbiosis in early eukaryotic evolution.
The endosymbiosis hypothesis was first proposed in the 1960s by biologist Lynn Margulis, who believed that organelles such as chloroplasts and mitochondria, the energy-producing organelles in all eukaryotic organisms, were originally free-living organisms that were conscripted into the bodies of larger cells.
The mitochondrion is thought to have had its origin in the fusion of an anaerobic archebaterium and an aerobic eubacterium in the process of endosymbiosis.
He describes how these constraints affected the later evolution of cells and kept bacteria and archaea simple organisms, and how an endosymbiosis in which one bacterium got inside an archaeon broke those constraints and enabled the evolution of more complex cells, and why it only happened once.
Hraber, Discovering Molecular Mechanisms of Mutualism with Computational Approaches to Endosymbiosis, University of New Mexico, Santa Fe, NM, USA, 2001.
635-600 million years ago - mya-), a process preceded by endosymbiosis.
That the theory of endosymbiosis was relatively new and the mechanism of chemiosmotic oxidative phosphorylation not yet taught impresses them little.
2011, Metabolic constraints on the evolution of genetic codes: Did multiple 'preaerobic' ecosystem transitions entrain richer dialects via Serial Endosymbiosis, http://precedings.